Anybody got the anatomy of the rear vent area? Trying to fish some wires so I can put a 3rd brake light in the vent area. Saw someone that had it done at the Nationals in NC recently. I've tried fishing a piece of wire up the vent tube, but it seems to hit something and I don't know how to work around it. My head liner is good, so I don't want to have to pull it lose to do this. Anyone have a diagram or pictures of what it looks like under the metal?