Finalize Prototype Mechanical Part

I have a partially completed CAD model for a mechanical component and I need a fresh set of expert eyes to bring its structural design to the finish line so I can send it straight to prototype testing. The design is roughly 90 % there; what’s missing are the final strength-related features
You’ll receive the current files plus a STEP, STL, 3mf file we need to increase the diameter with it connector the 2 circuit board also need to add the connector to the larger circuit boards. Files with picture of the unfinished part showing the wire need to cover, and the 2 circuit boards.

need a step, stl and 3mf file with the finish part