Hello, I have a bit of a problem. I just purchased aftermarket speakers (my head unit is also aftermarket) for my MK3 and there is no wiring in the back doors for them, there is a place but I could not find any wiring. My question is how do I do the wiring? I have no experience in this field and just wanted to know from where to run the wires. Does anyone have any schemes or anything to help out? Or can you suggest where to start from? Thanks.