WARNING: This page is about a different car, the 2005 Mercury Montego, 2005 Ford Freestyle, and 2005 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Components Of Subwoofer Amplifier - Sedan
Courtesy of FORD MOTOR CO.
Fig 2: Identifying Components Of Subwoofer Amplifier - Wagon