This is a mounting plate that should be compatible with most of the "Pro" Unifi Wireless Access Points. (I don't have any others to test)

There are four Multiconnect slots, which is the most I can get to reasonably fit into the dimensions of the mounting plate. This snaps very securely onto my Multiboard/Multiconnect system. It works pretty well sideways too, if you need to rotate for cable routing.

Printed in PLA. Pay attention to your speeds and bed temperature/print cooling because the locking tabs might warp.

These worked really well with both the standard Multiconnect and the flush Multiconnect if you don't need to clear any snaps holding your Multiboard together.