The modular Plug & Play cable harness PP-MQS 5.4 is made for a space-saving connection of a MATCH amplifier with 20-pole System Connector to an OEM head unit with 52-pole Quadlock connection such as Mercedes, Volkswagen etc. For connecting the power supply of older 40-pole Quadlock systems (e.g. Power Quadlock) an additional adaptor is included in delivery.