Installing new stock (turn signals added) wiring on 1956 3200. Got the harness from M&H. I am putting New LED tail lights that have two wires (black & white). On Led assemblies does it make a difference which wire goes where. What I don't know is how they are wire internally. Are they different from the old two contact bulb system. I have some concerns with the M&H harness but will report later when installed. I assumed the Black wire to the right rear was my tail light line and I tapped into it for my center License plate bulb (no provision for this light in harness).