Lights have a short pigtail with a connector and rubber plug. The plug will seal the hole left by the original tail light bulb socket. The boards can mount 2 ways. You can either drill a couple holes and mount them using screws or place a small amount of silicone around the edge of the board gluing them into the the housings. Once the boards are in the housings and housings reassembled its a simple matter of unplugging the original tail light harness and installing the new supplied harness. You need to run 1 wire into the interior from the trunk, disconnect the white wire from the brake pedal switch and insert the supplied wire as well as remove your thermal flasher and install the supplied electronic one. A replacement reverse lens is not required. All components are designed to work with the factory lenses.