Hi Luis,
I think what you want is to show all the request from USS and SDM in the USS interface?
If you click the link marked in the image above you'll get the following view with all the tickets (Incidents and Request) created in SDM for the contact with the same email_address as the end user:
If you don't see the link, you should check the Service Catalog Data Source and set to 'Yes' the 'Service Desk (Tickets) View' option.
Regards!