Backup Camera ?

I did basically what you are going for. I mounted a rear view camera on the back of my toolbox. It allows me to see the pin and hitch while the toolbox is open which saves the inevitable multiple cycles of opening the toolbox to get out what I need to hook up followed by closing it so that I can see. I use the bumper mounted camera to get close and then switch to the box cam to finish it off. I will try to take some pictures this afternoon.