Looking for any information regarding audio signal source for an LOC for an aftermarket amp/sub instal package. In many of the previous models (MK 5, 6, 7) I would just tap in right behind the discovery media box in the glove compartment. On the MK8 S model there is NO DISCOVERY BOX in the glove compartment. My only other choice is to sort through all the wires in the B-pillars until I find the rear speaker channels for the L/R sides. If anyone has found a signal source for the rear speakers please post here. I've got all the equipment ready to install but no signal source. sadface