Hi there, I want to connect a Kenwood subwoofer to the Discover media that came with the van. I am trying to find out which wires are the speaker wires on the back of the unit, can't find any VW wiring diagrams anywhere. The wiring on the Kenwood has the option of Yellow and Red RCA connections or you can connect directly to the speaker wire which would be more of a ball ache, connecting to the RCA leads would obviously be much easier if adapters can be bought, any help would be appreciated