I am pretty sure I have seen a couple of Bolts with a tow hitch installed, but not EUV's. I would like to tap into the pool of collective knowledge on the subject 
I can move the rear bumper fasica by hand ~1/4" from underneath.I definitely didn't get the top bumper portion back together properly. The area in the pic needs to clip somehow but I can figure to what. Anyone familiar with this area of the bumper?