A Preferring TEL te SAFETY AND INSTALLATION INSINUATIONS Wiring Through Top of Unit Unscrew the screws on the back plate. Open the fixture and separate the fixture from the back plate. Drill the mounting holes on the back plate using an electric drill. Drill the corresponding mounting holes in the mounting surface. Hammer the rubber expansion plugs into the mounting holes in the mounting surface. Remove the 1/2 plug on the top side of the back plate.