Custom action for context menu in Site Content and Structure

Question

I'm trying to add a custom action to the context menu in the Site Content and Structures view:

However I can't find the location ID I need to use - Microsoft.SharePoint.StandardMenu doesn't seem to do the trick.

There is a great list by John Holiday and the list on MSDN, but neither does help me.
I'm close to just using Javascript to attach to the menu. Anyone know how to access the item level / list level menus?

Answer 1

I believe that is the EditControlBlock to which you are trying to add the custom action.