Under the Rear Suspension Crossmember
WARNING: This page is about a different car, the 2004 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
Courtesy of GENERAL MOTORS CORP.
IMPORTANT:
The floor jack (2) pad must not be placed under the rear suspension crossmember (3) front reinforcement rib.
Position the floor jack (2) pad as shown in the illustration.