WARNING: This page is about a different car, the 2003 Ford Thunderbird. However, it is still accessible from the selected car via links, so may be relevant.
Align the notches in the bushing at 45° from the fore and aft position.
Fig 1: Aligning Notches In Bushing
Courtesy of FORD MOTOR CO.
Using the special tools, install the rear axle isolator bushing.