Hitching mirror on Pin box.

I posted a similar thread but my problem was climbing in and out of the bed. I can't see the hitch because the AUX fuel tank I installed blocks my view. My method was to climb into the bed and stick in a board into the closed hitches jaws (the board is approximately one inch by one inch by a couple feet long. The board sticking up was a perfect target my problem was climbing into and out of the bed multiple times. Someone suggested I install steps that allow me to climb up and have access to the bed without getting into it. I haven't had the steps fabricated yet but I already know that having the board sticking straight up from the jaws makes lining up easy. Sticking a board or broom handle in the jaws may be all you need to help you aim. determining a way to get it in and out with minimum effort is something you will have to experiment with.

PS I do like the soda bottle idea that newk suggested