424,7 License Plate Marker Light Mount (ea). Mount auxiliary marker lights or turn signals to your license plate & open up that saddlebag area or just streamline your rear fender. This simple system mounts directly to the back of your license plate with support backing plate & two side mount brackets. The side mount brackets have a 3/8" hole & will accept Küryakyn Silver Bullets or L.E.D. Mini Bullets (sold separately).