When I took mine off there was no airbag in there, I could see the bottom of it at the roof so it must be in the roof lining. I literally took out the torx screw and popped it off, it just interlocks with the dash at the bottom so slides forward to come off. Didn't take a picture otherwise I would post it, my parrot microphone is mounted on the top of the a pillar with the wiring behind.
Hope this helps
Tom