I am running a 120v receptacle and going to floor flange mount the box, in is next to a air tank for condensate drain, and I want to put another support on it. Does it say anywhere how a support must be mounted ( a mini ). I know the picture has the wrong size mini need a 0, but can I use neo magnets to mount it? I cant drill or weld on tank. It takes allot of force to remove it.