2007 Toyota Prius Owners Manual - Page 116

-Using a top strap Anchor brackets 22p050b 22p055c 22p056e Symbol 2. To remove the booster seat, press the buckle release button and allow the belt to retract. Follow the procedure below for a child restraint system that requires the use of a top strap. Use the anchor brackets on the back of the rear seatback to attach the top strap. Anchor brackets are installed for each rear seating position. This symbol indicates the location of the anchor brackets. 99