I've got a portable MP3 player (flash card) that I want to wire into my System 10. I'd like to have one end of the wires loose with a stereo mini connector, so I can just plug in the player when I need to. Where should I wire in the preamp signal? Looking at the wiring diagram, it looks like I have to split the signal to the 4 channels (FL,FR,RL,RR) and run these to the amp. Also, how would I tell the system 10 that I want this extra input? I could put a blank tape into the deck, but I'd still get noise.