Hi to everyone and I hope you all had a good Xmas so far!!

My 2.2 cdx 2001 estate has a microphone built in to the centre of the front interior light so I imagined it would have the phone kit prewiring installed which all the relevant previous threads indicated should be taped to the back or top of the glove box behind the dash. I have had a good feel around and cant find it. Where does this prewired lead come from??Is it a seperate plug in the back of the radio(CCR 2006) or spliced into the loom??
Thanks
Rich