Pretty simple--There is a bracket attached to the lower side of one of the skins, with a couple holes in it. The pump butts up against this bracket and has a threaded bolt type clamp that holds it in place. If all your plumbing is intact, it will line up the pump with the bracket that I am talking about!
Thanks Kevin and Bruce for the help, so the first picture I show, is where the U bolt would attach the pump? Second picture is a upper bracket with holes, is there another U bolt that attaches through here? Couldn't quite make it out in your picture Bruce, Thanks again for the help!! Brian