Wondering what the second 6-wire connector is

[MagnusMTB]

I am the new owner of a 2007 BMW X3. It has Nav, premium sound system, and pre-wired for sat. radio. I want to see about putting in a Dice MediaBridge 1500 so I started snooping around in the center console just to make sure I understood the installation. I was able to fish out the wrapped cable bundle for the CD changer and found 1 3-wire connector and 2 6-wire connectors. One of the 6-wire connectors had a sticker around it that said something like CD-SARDS.

So, I have a few questions. I am assuming the 6-wire connector with the sticker on it is the one for the CD changer, what is the other one for? Also, I can tell from working with the Nav/radio that the radio has DSP. Everything I am readying is saying that if the radio has DSP I need a special adapter. Also, everything I am reading keeps talking about a coax cable for the DSP; I have not found one of them yet in the center console.

Any help is appreciated.

thanks.