With my new Hitch it sits a lot lower in my new truck then my previous combo. So I can not see the hitch at all from my seat. I have a crew cab with a roll up tonnaue cover. I took a dowel rod drilled a small hole and put a drywal screw in the end so it is flush. Super glued a magnet to the screw and end of dowel rod. I put the dowel rod on the edge of the hitch plate to line up the center. Then I line that up with the center of the pin. Works great, once hooked when I lock the jaws remove the dowel rod. Put in tool box until needed again.
Although a camera you can see if the 5er is the right height as well. I still need to get out once I get close and make sure the height is right.