tail light wiring plug

[72blazer_mud_bogger]

on my 72 blazer i am in the middle of installing a summit wiring harness, i decided that since i dont have new lights for the rear i was just going to stop the wires for now at the old harness plug on the drivers side of the gas tank. i can tell what color the wires are. i need to know when i am looking at the plug on that is stuck in the frame, there are 4 wires going into the plug if the yellow stripe wire is on the left side, going left to right what wires go where. i found a wiring diagram but it doesnt help. cause like i said i cant tell what color it used to be.
thank you