I am re-wiring my TR-3A with a modern after market wiring harness The Triumph Instruction Manual says the blue and red wire goes to the "main" headlight and the blue with white wire goes to the "dip" head light. I would think the "dip" would be the low beam but am not sure and since I am eliminating the bayonet connectors and installing modern plugs I'd rather get it right the first time. Is the main the high beam and the dip the low beam? Thanks Tom