Traduciendo paso 5
Connect the WHITE wire on the switching module to the Reverse lights wire using scotchlock provided with kit The Reverse light in BMWs is located on the tail light connection.
Reverse Light Wire is typically White/yellow but you will want to test to verify
Mount the Module to a ground point either on the chassis, or on the TV Video module mounting bracket directly. Relay MUST be connected to ground point such as chassis our mounting bracket to function