WARNING: This page is about a different car, the 2006 Lincoln Navigator and 2006 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
Expedition
Fig 1: Exploded View Of Driver Air Bag Module Components - (Expedition)
Courtesy of FORD MOTOR CO.
Navigator
Fig 2: Exploded View Of Driver Air Bag Module Components - (Navigator)