I'm converting my 69 TA from factory rally guages to factory stacked guages. Has anybody done this? I repinned some of the wires in the 12 pin connector(after tracing the wires on the copper circuit board)but I may also have ground issues. How is everything grounded? I have the three metal stampings 1. headlight to wiper 2.radio to lighter to cluster 3. heater to dash stud. Also I don't have headlights, where is the grounding source for headlights and wipers? Thanks Tyler