Question Installation of M-Uno on UPAS and OBS Pier

I have sent Avalon Instruments a request for information on the subject matter but after I have been asked to send pictures of my setup, I have not received further communications; I assume that my emails may end-up in your spam folder, thus I am going through the Forum channel in hope that my messages will get to you.

The setup I have is the M-Uno installed on the OBS Pier, via an OBS Pier adapter mount flange, as shown in the attached pictures. As I want to add the UPAS to my setup, I need to know what else is needed for the installation.

From what I understand,  the M-Uno fixed flange can attach directly onto the UPAS but the UPAS may not attach directly to the OBS Pier flange. I assume that I have to attach the UPAS to the OBS Pier via the OBS Pier adapter mount flange but I am not sure of what is needed to attach firmly the UPAS to the OBS Pier adapter mount flange.

Could you provide me with the information on what Avalon Instruments parts are required to attain my goal?

Thanks for all your help.