Need help finding CD-changer wiring in '06 X5

[gmx]

I want to hook up a DICE iPod unit to my 2006 X5 (Nav, no CD Changer, DSP), but simply cannot find the CD-changer wiring.

Let me start by saying I've installed one of these in my E46, so I know the basic procedures. I also understand that the '06 models have 3-pin, 6-pin and DSP coax cables. I've watched the videos; the connectors always seem to be fairly easily discoverable. I've pulled most of the back end apart, and while I've found the coax, there are no 3-pin or 6-pin connectors that are unused. There are a couple that are plugged in (see yellow arrows in photo below), but nothing else I can see that could possibly be the connectors. Any help is appreciated!