Aug 24, 2021Strip about 6mm of insulation from bell wire. Separate wires enough to connect the white/red wire to RED terminal screw and the white wire to WHT terminal screw. Fasten the door control to an inside garage wall with sheet metal screws (3) provided. Drill 4mm holes and use anchors (6) if installing into drywall. Related searches for liftmaster wiring diagram garage door ope liftmaster safety sensor wiring diagramliftmaster garage door opener schematicliftmaster wiring schematicliftmaster professional wiring diagramgarage door wiring schematicliftmaster gate opener wiring diagramchamberlain garage door wiring diagramliftmaster sensor wiring diagram