When fitting the tow hitch in the Model 3, you have to remove the cover which leaves a big hole for lots of dirt to get in. This cover only spares the tow-hitch itself and the plug for the electrical connection.
Since the cover would be to big for my 3D printer, I made 2 halfs and a connector which is glued in place.
Disclaimer: I do not take responsibility for this part, please use at your own risk.
I printed the fixing screws horizontal to improve strength.
The author hasn't provided the model origin yet.