sorry for a basic question, but if anyone can route me in the right direction, I would appreciate it. The PO of my 53 GMC half ton converted to 12 volt and simply mounted a temp/fuel/alernator cluster under the dash. So the only guage that worksis the speedometer. I want to move back to the original guages, I have bought a rebuilt cluster and need to know what to do to switch this cluster back to original. Is there a tech site that explains it?