Be sure vehicle is in park, set parking brake, and disconnect negative terminal from the battery.
Plug in the truck side brake/turn connector, making sure that you plug it in the "right" way, maintaining the correct wiring orientation from truck to jumper harness, and secure with a zip-tie. The zip tie is required because the H13/9008 male connector does not have a locking tab.
Plug in the truck side reverse light connector.
Run the wiring and LED load resistor down to a suitable metal location, load resistors get hot, and adequate care must be followed when selecting a mounting location. Below is a picture of where I mounted the LED lead resistor on my truck. Note that I used both an aluminum heat sink, secured with 3M VHB 4622 industrial strength adhesive tape. Do not use adhesive tape directly on the resistor. Use industrial grade sticky tape if you mount them as pictured.
Connect the single remaining connector to the 2013+ LED Tail Light, and be sure to slide the red locking tab to the locked position.
Reinstall tail light into vehicle.
Check for proper operation.