How do you install the headlight harness that you splice? Where do you splice the wires at? I have the one's that connects to the battey and just plugs into the factory harness, but my friend got the kind that you need to splice. I'm not sure where you splice the wires.

 

Are the lead labelled? THe harness works in this fashion. The factory plug fires the two relays that pull the juice from the battery and route it to the two harness plugs.