Using these marker lights is easy. First, make sure your vehicle's power supply is 12V. Connect the 2 - pin pigtail connector to the appropriate wiring on your vehicle. The rubber grommet helps with a secure and water - resistant fit. When installing, clean the area where you'll place the lights. As for colors, you can choose red or amber according to your preference. For maintenance, wipe the polycarbonate lens with a soft, dry cloth regularly. Avoid using harsh chemicals as they may damage the lens. If you encounter any issues, refer to the 2 - year warranty for support.