Trying to add a larger subwoofer and amp in storage area of my evoque but don't want to change my oem stereo. The problem i am having is noone has a wiring diagram of the speaker wires. I need this to patch in an intergface for my apm to receive the stereo signal. Does anyone on here have any ideas about where i could obtain this wiring diagram. I have already called Scosche, the maker of the interface, and the Range Rover dealer to no avail. Someone please help.