So, to add to it, the lights in valance each have a two filament bulb, that are parking light for one filament and turn signal on the other filament. If the bulb sockets have just two wires each, that means the grounding is done through mounting screws like mentioned. IF there is a single wire hanging around coming out of that harness, it will be for the fendertop mounted turn sig indicators if the car was optioned as such.