There is a black plastic box with 5 big circular holes in it (looks almost like a cup holding tray) under the carpet directly behind the driver's seat. If you pull it out it covers nothing and just creates a rectangular hump in the carpet. What the heck is this for? There is carpet under it also so do you think it is to be thrown away and the formed carpeted cavity used to store something - maybe the manual? It must have some purpose. This is the kind of thing that bugs me until I figure it out so some quick help would be appreciated. Thanks in advance.