Mike, I don't know how to link to previous posts but somewhere on this forum, Barry (of Barry-Sue) posted showing the use of command hooks to hold his fishing rods. He uses the hooks with the flexible rubber loop that hooks on and off.
I am no electrician but I do know that 50 amps requires two hot legs, a neutral and a ground for a total of four legs. 30 amp only requires three legs, one hot, a neutral and a ground. I have a 50 amp (four leg) plug on my house and a 30 amp (three leg) plug on the PC. So I have a dog bone that has four legs for the house and three holes for the the PC. Basically it drops one of the the hot legs from the 50 amp. I would have to question if you have 30 or 50 amps in the PC. If you do how does it work?