For display purposes, we have this LED light bolt flipped upside down so you can see the LED light. For use, you'd want this flipped towards the plate's face. There are simply a red (positive) wire and a black (ground) wire coming out the back. Chances are that your vehicle still has the license plate light harness zip-tied up under the frame. Fish those wires out and hook them up so those new LED lights light up with your taillights.