diff --git a/TEMPLATE/map.jinja b/TEMPLATE/map.jinja
index 4fd936a1..d70e2afa 100644
--- a/TEMPLATE/map.jinja
+++ b/TEMPLATE/map.jinja
@@ -34,7 +34,8 @@
 
 {%- for map_source in map_sources %}
   {# Lookup the grain/pillar/... #}
-  {%- set map_values = salt['config.get'](map_source, []) %}
+  {# Fallback to use the source name as a direct filename #}
+  {%- set map_values = salt['config.get'](map_source, [map_source]) %}
   {%- if map_values is string %}
     {%- set map_values = [map_values] %}
   {%- endif %}
diff --git a/TEMPLATE/parameters/defaults.yaml b/TEMPLATE/parameters/defaults.yaml
index 8c437396..11d124a4 100644
--- a/TEMPLATE/parameters/defaults.yaml
+++ b/TEMPLATE/parameters/defaults.yaml
@@ -12,7 +12,12 @@ subcomponent:
 # Just here for testing
 added_in_defaults: defaults_value
 winner: defaults
-# Configure map.jinja to load formula parameters values
+# Configure map.jinja to load formula parameters values and merge them
+# in the order from most generic (first) to most specific (last).
+# Each source can define the merging `strategy` which default to the
+# `smart` strategy of `salt.slsutil.merge`.
+# Note: Any value not evaluated by `config.get` will be used literally.
+# This can be used to set custom paths, as many levels deep as required.
 map.jinja:
   sources:
     - osarch
@@ -20,3 +25,4 @@ map.jinja:
     - os
     - osfinger
     - roles
+    - any/path/can/be/used/here.yaml