I wanted a Raspberry Pi IR cam mount that was mounted in the center of the Y carriage so I used the arms and cam case from https://www.thingiverse.com/thing:2671535, added small pass through loops for cable management, and made a clip on base and arm mount in Tinkercad. I made the arm mount separate from the clip on base for flat printing, and it is easily glued in place. To mount, you will have to flex the mount slightly to get the front edge to clip under the carriage. It easily cleared my Y belt tensioner with no problem.
You will need 3m x 22 mm screws and hex nuts or thumb nuts for assembly.