Hi, I'm fitting a old M Station (MP3 player) in the wheel arch of my car I've connected it up to the head unit and now have to connect to a live and earth. It says connect to the live and earth that supply the head unit, I don't want to do that as if I cock it up I won't have any music at all. So the question is, are there any suitable cables in the passengers side wheel arch that I can connect to? I thought about the supplies to the lights, but they wont be live until the lights are switched on, will they? Hope someone can help, thanks in advance, Christian.