That pink/black wire is not factory; there are no wires in the duct. I recommend tracing it to see what it could be. Was there ever an alarm installed?
The screw you can see in the duct is the only screw holding it in place. Take out the screw (and don't drop it) and have a better view where that wire goes. Perhaps the duct was out before and someone carelessly put it back trapping a wire, but I can't imagine a single stray wire outside a loom in that area.
The screw you can see in the duct is the only screw holding it in place. Take out the screw (and don't drop it) and have a better view where that wire goes. Perhaps the duct was out before and someone carelessly put it back trapping a wire, but I can't imagine a single stray wire outside a loom in that area.