I am currently repairing the rear harness of a 68 Camaro and would like to know where is the ground location for the rear side markers. I can not find this in the assembly manual (nothing on tail lights either) and have been searching here with no avail. My guess is one of the screws holding the filler neck but I want to be sure and which one if that's what it is. A picture sure would help a lot also. Frank.