I am not sure about the name, but the door right above the subwoofer, between the 2 seats of my roadster, just got detached.

I can't see where the hinge should clip; is there a diagram that show how that trap goes back in?

 

Push in, then up. It should click... at least it did for me.

Took mine out to add tension since it kept popping open, but that was a waste of time.
A couple of little rubber stick-on feet in the top corners (next to the too-small ones) fixed the tension problem.