Factory Position for BT Mic

Hey guys...Thanks a ton for all the info.

I have a question, i am about to install the BT box into my RNS-E on a B6 2005 A4. Where is teh factory spot for the MiC? I had a symphony II radio before, no phone prep, and have air bags in pillars.. I will be install the BT into the glove box..

I saw somone post about the mic spot being in the dome lights?? I have a US spec UltraSport..

Thanks alot!
-Scott