DPC

Got a problem (hopefully not big) with my 1996. Whenever I'm turning, especially hard, I hear what seems like something rocking and rolling in the car and it seems to be coming from around the parking brake area beneath the plastic - almost like a "D" battery rolling a round under there. Very annoying and I can't figure out what it is, let alone directly localize it. Any ideas or instructions on how to remove that plastic piece(s) around the parking brake would be helpful. Thanks.