i have 73 gmc 3/4 ton truck with a granny tran 350 w a rv cam. My question is about the cable that attaches to the temp control panel. The end of the cable has a round loop that attaches to a post and is secured with push on clip. I am not sure where the metal part that is attached to the cable goes? There is a slot on the control panel and hole for a screw. There is also a hole in the metal part. Any help would be appreciated.