Step 1: Turn your wheel towards the center of your car to give yourself working space. Using a flathead screwdriver, pry out the OEM side marker light.
Step 2: Disconnect the stock harness from the socket of the side marker light.
Step 3: Connect the stock harness to the connector of the LED side marker light circled in red. Tap the longer red wire to a positive (+) connection. Test your LED side marker lights to make sure all the white and amber LEDs work. Once they do, affix the LED side marker lights to finish. Enjoy your new Nissan GT-R LED side marker lights!