2005 Cadillac STS Owner's Manual - Page 43

If you have an adjustable head restraint, route the top strap under it. Top Strap Anchor Location Your vehicle has top strap anchors for the rear seating positions. You will find the anchors behind the rear seat on the filler panel. In order to get to each bracket, you will have to open the trim cover. When using a top strap-equipped child restraint in a rear outboard position, be sure to route the top strap under the head restraint. {CAUTION: Each top tether bracket is designed to anchor only one child restraint. Attaching more than one child restraint to a single bracket could cause the anchor to come loose or even break during a crash. A child or others could be injured if this happens. To help prevent injury to people and damage to your vehicle, attach only one child restraint per bracket. Once you have the top strap anchored, you will be ready to secure the child restraint itself. Tighten the top strap when and as the child restraint manufacturer's instructions say. Do not secure a child restraint with a top strap in the right front passenger's position if a national or local law requires that the top strap be anchored, or if the instructions that come with the child restraint say that the top strap must be anchored. There is no place to anchor the top strap in this position. 1-37