I found these cables coming from under the dashboard in a 997 from the passenger side footwell. The non-circled one looks to be a charger for a phone (old one) or a bluetooth kit or whatever - it came from the 12v socket in the passenger footwell.

It is the circled connector that I am interested in. What could it possibly be for? Like I said, its coming from the passenger side footwell (front-side wall) under the dash.

 

Possibly a connection for a Sirius/XM receiver? It would have to be aftermarket for your year car so would make sense.

 

Some kind of antenna connection, possibly for Satellite radio..

 

I googled around for some images of XM Radio connectors, looks like these guys are nailing it. Definitely looks like an XM Antenna connection.

 

I think you are right. The 12v charger I found has an XM label on it. Now how does the XM radio play its sound? I don't see any dangling connections going/coming from the PCM (the prev owner could have uninstalled it).

Drat! I was hoping this was some sort of a bluetooth device cable that was already hooked up to the PCM so I can play music through it. Seems like I'm out of luck
I opened the hood and checked if there were any remnants of a Dension or Nav-TV setup and found nothing. No DVD drive as well. So the car has PCM 2.1 without DVD, correct?
Can the in-dash CD player play MP3?

 

The in dash player can not play MP3s. I'm guessing that satellite receiver was probably used with an FM Modulator that plugged into the radio antenna connection.
I have the Dension unit in my 2005 997 Carrera and I like it alot. Navigation is a little tricky until you get used to it but everything works with my iPhone 5. I was pleasantly surprised to see that the google maps audio comes out of the speakers whenever a turn is announced as well even though I have not as of yet hooked up my bta1500 bluetooth module that I purchased for the Dension.

 

I am not a big fan of the FM modulator setup. In my old '86 3.2, I preferred the cassette-3.5mm adapter to the FM transmitter as that was more reliable (sound quality is a different thing though). I just want a way to play songs from my iPod through the car speakers - doesn't necessarily have to be operable through PCM. Looks like Dension is the way to go (for lack of cheaper, reliable options)

My 997 doesn't have the CD changer (Main + Trip check) which means I need to get it enabled by the dealer before I can even install a Dension - correct? Can't my indy shop enable the CD changer? I'd like to have the thing setup before winter sets in as I don't have a heated garage to work in.

 

IF your aftermarket shop has the PWIS computer they shoudl be able to do it. The Dension is a quick install. I did mine in winter. No Problem.