If you have the factory hitch (which is what we call a towing bar over here) then that tow loop/tie down U shaped fitting does come off and the forward end of the towbar bolts to a pre welded bracket on the bottom of the car.
I've never seen the wiring plugs pre-wired in on any NA spec car but the simple thing to do would be to lok in the boot (trunk) area, probably in the spare wheel well and see if these are wired to the rear light (usually the left side rear light wirng harness is used) or test the sockets electrically.
I've never seen the wiring plugs pre-wired in on any NA spec car but the simple thing to do would be to lok in the boot (trunk) area, probably in the spare wheel well and see if these are wired to the rear light (usually the left side rear light wirng harness is used) or test the sockets electrically.