The locker was installed by a shop in Vegas, it was so simple for the install in conjunction with gears they didn’t charge me. A hole for the wiring was drilled through the top of the diff housing. The wiring has 4 wires, one ground, one 12V+, and two for a light of locked or not. I just have a basic switch, I had to make my own basic harness since I don’t have aux switches. The locker was @ $900 from just differentials
Bottom Line anyone with basic automotive knowledge could wire one of these things together.