I am looking to add an overhead LCD/DVD unit and looking to connect the audio signal directly to the AUX port but from the wires behind the AUX module. Right now, I am showing 5 wires on the back of the factory AUX module; my thought is that 3 of these are for stereo input and the remaining two are used for the AUX port switch which allows the factory headend to detect a 1/8" phono cable (subsequently displaying the AUX as one of the mode on the radio display).

Does anyone know which wire's which? Thanks...