I have a 2006 X3 with NAV and Sirius. Looking to install a CarPC. So far have installed GNET video module. Location of install will be rear drivers side near NAV unit. Want to also install CD changer (would rather install in rear versus center console). Found only two wrapped connections in rear - one coaxial antenna type and a three wire connection. Not sure what these are for. For the CARPC will need an IBUS and AUX connection. I purchased my AUX cable yesterday but from what information I have the only way to connect is in the back of the HU unit. On my 330XI I used the back of the radio module in the trunk. I believe the IBUS connection is not a problem. Anyone have any details on what wires I should be able to find in the rear storage area of the drivers side?