2000 Regal - CD changer socket?!

Hi I'm brand new here.

Love my 2000 Regal - never been any problems but I'm a bit puzzled right now. I've just bought a Neo iOn Ipod connector and the manual says my car is meant to have a socket for it to connect to in the trunk!!

I cannot see one. I'm guessing it's meant to be an 'optional' CD changer connection but all I see in there is the wiring harness plugging into the Monsoon amplifier.

Anyone here got experience with this year model and radio installations that might shed some light on this?

Thanks,

Bill

UPDATE

For anybody else that's interested, I got a lot of help and information on RegalGS.com

http://www.regalgs.org/forum/viewtopic.php?t=15921

Just for the record I'd like to update this list on the situation with my Neo ion I-pod Installation.

I tried to install the Neo Ion (www.neocaraudio.com) in my 2000 Buick Regal but the requisite CD Changer cable was missing from the trunk. It turns out that the cable has been discontinued by GM since 2000.

On advice from a CaddyMac on RegalGS.org, I purchased the GMH32T "T" harness from Car Domain (www.cardomain.com) and had my GM dealer install this harness in the back of my factory radio. (Yep, I chickened out). Neo Ion shipped me their GM-A cable (cable used for Chevrolet Malibu on the cable list). This attached directly to the aftermarket T-harness. I set the dip switches to the E&C protocol:- < off off on off off off off on > plugged it in and it works exactly as described.

Perfect sound, great usability.