This is a remix of @DavidB's great Lego Minifig car hitch cover. I modified it to fit in a 1 ¼" Hitch Receiver. A ½" diameter hitch pin and clip will fit the Hitch connector.
As this will be outside in the sun and weather, I recommend you print this in PETG. The Lego Minifigure head has a smooth top so dirt, water and other road debris does not get stuck in it (Great design idea, @DavidB!).
I used super glue to connect the two pieces together.
Notes:
The author remixed this model.
I changed this Lego Head Hitchcover to fit a Class II trailer hitch. Instead of fitting on top of a trailer hitch ball - this remix fits inside of a 1 ¼" trailer hitch connector. The head had to be modified to receive the hitch connector from the back of the head.
I made the Lego Minifigure's face smooth so it would not trap debris.