In the Work Management view, click the tab for "Interop Work Requests" or "Interop Work Orders" or "Requests for Work". If the list contains too many items to scroll through easily, you can search for a name.  The RegistrationSite in the CCOM message determines the APM site 'location' for the entries created or updated by the integration.  By choosing the topmost site (in this example named "Install Site") and the hierarchy setting "this site and below," you should be able to see work documents throughout APM.