[Tfrazier]

Okay, so I have another mystery. Right above the driver  cockpit . On the underside of the overhead cabinet, there is something like a trapdoor but not really a trap door. It is hard to describe so I have attached a picture. Also, above the trap door, inside the overhead cab is a box. It appears these items are somehow connect but before I go digging around, I would like to know what it is.
Thanks