Added a 2.5 inch and a 3 inch Printed with .6 nozzle .18 layer height. Face plate has 2 layers thickness and hitch has 4.

I placed a pause in the print so you can change color or filament type from face to hitch or print the other one with no pause. I printed face with EPAX PETG Space gray and the hitch with Black PETG Carbon fiber.

The hitch has 1/8 inch play on sided to slide in to receiver and pins that hold it in. If you want it to lock then break pins and you will be able to slide a locking pin through it.