Hello,
Update:
I went to the Porsche dealer and they suggested to remove the PCM and this should access the cable. I did that once before when I replaced my HVAC levers.
Next day I went to my Indy and he pulled the cable off a bracket to allow the extraction of the cable and it;s mate right by the dash vent hole.
He inspected my new/used unit I bought from ebay and fixed the top tab so it would engage.
Connected the cable and slid and snapped the unit back into the dash. All Done!
You got to love Indys!!
MIKELLIG