the 4 wire.red for ignition +12v,orange for +12v battery,black for grounding and white for tacho input. The 2 wire socket for shifting light.Becoz it using led type be sure you connect this 2 wire correctly.Otherwise it won't light....
sorry for the mistake.......
As much as I have read with great interest from the threads, I still find alot of information still lacking in this forum, or rather the information is not organised and zooming in a topic to seek for...