OPmenu.xml

<?xml version="1.0" encoding="UTF-8"?>
<menuDocument>
  <menu>

    <!-- Other items in the main menu go here -->

    <!-- Divider before EFX Submenu -->
    <separatorItem id="dividerBeforeEFX" />
    
    <!-- EFX Submenu -->
    <subMenu id="EFXSubMenu">
      <label>EFX</label>
      <insertAfter refID="lastItemID" />

      <!-- Divider before OUT_Tools Submenu -->
      <separatorItem id="dividerBeforeOUTTools" />

      <!-- OUT_Tools Submenu (Only for SOP context) -->
      <subMenu id="OUTToolsSubMenu">
        <label>OUT_Tools</label>
        <context>SOP</context>

        <!-- Add your scripts to the OUT_Tools submenu -->
        <scriptItem id="null_out">
          <label>Null Out</label>
          <scriptPath>$EFX/scripts/python/out_tools/null_out.py</scriptPath>
        </scriptItem>

        <scriptItem id="merge_out">
          <label>Merge Out</label>
          <scriptPath>$EFX/scripts/python/out_tools/merge_out.py</scriptPath>
        </scriptItem>

        <scriptItem id="render_out">
          <label>Render Out</label>
          <scriptPath>$EFX/scripts/python/out_tools/render_out.py</scriptPath>
        </scriptItem>
      </subMenu>
    </subMenu>

  </menu>
</menuDocument>