WARNING: This page is about a different car, the 2003 Pontiac Grand Am and 2003 Oldsmobile Alero. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Center Of I/P
Courtesy of GENERAL MOTORS CORP.
Fig 2: Identifying RF of the Passenger Compartment
Courtesy of GENERAL MOTORS CORP.
Fig 3: Identifying Front Center of the Roof
Courtesy of GENERAL MOTORS CORP.
Fig 4: Identifying Right Side of the Passenger Compartment, Rear Package Shelf