How are booster seats attached to the vehicle?
Most booster seats are not attached directly to the vehicle. They are a seating platform for the child. The child sits on the booster and then the seat belt assembly is routed over the childs shoulder and hip area, holding both the child and booster into the vehicle. There are some boosters that do affix directly to the vehicle using the Universal Anchorage System (UAS). The booster is affixed to the vehicle, the child sits on the platform and then the seat belt assembly is placed over the child appropriately.