Concern with attaching bike rack to TT bumper

There are two things I wouldn't do. The first is to attach a bike rack to the bumper. Liked stated it won't carry the weight so you need a receiver to hook the rack onto. The second thing is I would never use a rack where the bikes hang. I did that and ruined two bikes as the weld broke on the rack and a dragged then down the road. Get a rack that holds them by the wheels.