diff --git a/x-pack/plugins/ingest_manager/public/applications/ingest_manager/sections/agent_config/create_datasource_page/components/custom_configure_datasource.tsx b/x-pack/plugins/ingest_manager/public/applications/ingest_manager/sections/agent_config/create_datasource_page/components/custom_configure_datasource.tsx
index 0c350b407e803..aff764cb8ba3e 100644
--- a/x-pack/plugins/ingest_manager/public/applications/ingest_manager/sections/agent_config/create_datasource_page/components/custom_configure_datasource.tsx
+++ b/x-pack/plugins/ingest_manager/public/applications/ingest_manager/sections/agent_config/create_datasource_page/components/custom_configure_datasource.tsx
@@ -6,7 +6,6 @@
 import React from 'react';
 import { FormattedMessage } from '@kbn/i18n/react';
 import { EuiEmptyPrompt, EuiText } from '@elastic/eui';
-import { ConfigureEndpointDatasource } from '../../../../../../../../siem/public';
 import { NewDatasource } from '../../../../types';
 import { CreateDatasourceFrom } from '../types';
 
@@ -17,14 +16,26 @@ export interface CustomConfigureDatasourceProps {
 }
 
 /**
- * Allows external plugins to create custom content for the Ingest
+ * Custom content type that external plugins can provide to Ingest's
  * Datasource configuration.
  */
 export type CustomConfigureDatasourceContent = React.FC<CustomConfigureDatasourceProps>;
 
-const ConfigureDatasourceMapping: { [key: string]: CustomConfigureDatasourceContent } = {
-  endpoint: ConfigureEndpointDatasource,
-};
+type AllowedDatasourceKey = 'endpoint';
+const ConfigureDatasourceMapping: {
+  [key: string]: CustomConfigureDatasourceContent;
+} = {};
+
+/**
+ * Plugins can call this function from the start lifecycle to
+ * register a custom component in the Ingest Datasource configuration.
+ */
+export function registerDatasource(
+  key: AllowedDatasourceKey,
+  value: CustomConfigureDatasourceContent
+) {
+  ConfigureDatasourceMapping[key] = value;
+}
 
 const EmptyConfigureDatasource: CustomConfigureDatasourceContent = () => (
   <EuiEmptyPrompt
diff --git a/x-pack/plugins/ingest_manager/public/index.ts b/x-pack/plugins/ingest_manager/public/index.ts
index ff923bc9043c9..e26f310b6d9c6 100644
--- a/x-pack/plugins/ingest_manager/public/index.ts
+++ b/x-pack/plugins/ingest_manager/public/index.ts
@@ -15,6 +15,7 @@ export const plugin = (initializerContext: PluginInitializerContext) => {
 export {
   CustomConfigureDatasourceContent,
   CustomConfigureDatasourceProps,
+  registerDatasource,
 } from './applications/ingest_manager/sections/agent_config/create_datasource_page/components/custom_configure_datasource';
 
 export { NewDatasource } from './applications/ingest_manager/types';
diff --git a/x-pack/plugins/ingest_manager/public/plugin.ts b/x-pack/plugins/ingest_manager/public/plugin.ts
index fd4e08f619495..3eb2fad339b7d 100644
--- a/x-pack/plugins/ingest_manager/public/plugin.ts
+++ b/x-pack/plugins/ingest_manager/public/plugin.ts
@@ -18,6 +18,7 @@ import { PLUGIN_ID } from '../common/constants';
 
 import { IngestManagerConfigType } from '../common/types';
 import { setupRouteService, appRoutesService } from '../common';
+import { registerDatasource } from './applications/ingest_manager/sections/agent_config/create_datasource_page/components/custom_configure_datasource';
 
 export { IngestManagerConfigType } from '../common/types';
 
@@ -26,6 +27,7 @@ export type IngestManagerSetup = void;
  * Describes public IngestManager plugin contract returned at the `start` stage.
  */
 export interface IngestManagerStart {
+  registerDatasource: typeof registerDatasource;
   success: boolean;
   error?: {
     message: string;
@@ -80,12 +82,16 @@ export class IngestManagerPlugin
       const permissionsResponse = await core.http.get(appRoutesService.getCheckPermissionsPath());
       if (permissionsResponse.success) {
         const { isInitialized: success } = await core.http.post(setupRouteService.getSetupPath());
-        return { success };
+        return { success, registerDatasource };
       } else {
         throw new Error(permissionsResponse.error);
       }
     } catch (error) {
-      return { success: false, error: { message: error.body?.message || 'Unknown error' } };
+      return {
+        success: false,
+        error: { message: error.body?.message || 'Unknown error' },
+        registerDatasource,
+      };
     }
   }
 
diff --git a/x-pack/plugins/siem/public/common/mock/endpoint/dependencies_start_mock.ts b/x-pack/plugins/siem/public/common/mock/endpoint/dependencies_start_mock.ts
index d3fc653f4c9ba..759ec45c7e54b 100644
--- a/x-pack/plugins/siem/public/common/mock/endpoint/dependencies_start_mock.ts
+++ b/x-pack/plugins/siem/public/common/mock/endpoint/dependencies_start_mock.ts
@@ -4,7 +4,7 @@
  * you may not use this file except in compliance with the Elastic License.
  */
 
-import { IngestManagerStart } from '../../../../../ingest_manager/public';
+import { IngestManagerStart, registerDatasource } from '../../../../../ingest_manager/public';
 import {
   dataPluginMock,
   Start as DataPublicStartMock,
@@ -56,6 +56,6 @@ export const depsStartMock: () => DepsStartMock = () => {
 
   return {
     data: dataMock,
-    ingestManager: { success: true },
+    ingestManager: { success: true, registerDatasource },
   };
 };
diff --git a/x-pack/plugins/siem/public/index.ts b/x-pack/plugins/siem/public/index.ts
index 9e31ba8d771f7..36344a25e1568 100644
--- a/x-pack/plugins/siem/public/index.ts
+++ b/x-pack/plugins/siem/public/index.ts
@@ -11,5 +11,3 @@ import { PluginSetup, PluginStart } from './types';
 export const plugin = (context: PluginInitializerContext): Plugin => new Plugin(context);
 
 export { Plugin, PluginSetup, PluginStart };
-
-export { ConfigureEndpointDatasource } from './management/pages/policy/view/ingest_manager_integration/configure_datasource';
diff --git a/x-pack/plugins/siem/public/plugin.tsx b/x-pack/plugins/siem/public/plugin.tsx
index 4b8fc078fc016..b4e0de4ff316d 100644
--- a/x-pack/plugins/siem/public/plugin.tsx
+++ b/x-pack/plugins/siem/public/plugin.tsx
@@ -20,6 +20,7 @@ import { KibanaServices } from './common/lib/kibana/services';
 import { serviceNowActionType, jiraActionType } from './common/lib/connectors';
 import { PluginSetup, PluginStart, SetupPlugins, StartPlugins, StartServices } from './types';
 import { APP_ID, APP_NAME, APP_ICON, APP_PATH } from '../common/constants';
+import { ConfigureEndpointDatasource } from './management/pages/policy/view/ingest_manager_integration/configure_datasource';
 
 export class Plugin implements IPlugin<PluginSetup, PluginStart, SetupPlugins, StartPlugins> {
   private kibanaVersion: string;
@@ -131,6 +132,7 @@ export class Plugin implements IPlugin<PluginSetup, PluginStart, SetupPlugins, S
 
   public start(core: CoreStart, plugins: StartPlugins) {
     KibanaServices.init({ ...core, ...plugins, kibanaVersion: this.kibanaVersion });
+    plugins.ingestManager.registerDatasource('endpoint', ConfigureEndpointDatasource);
 
     return {};
   }