2007 Toyota Sienna Owners Manual - Page 154
2007 Toyota Sienna Manual
Page 154 highlights
07 SIENNA_U (L/O 0612) Use the anchor brackets on the back of the second seats to attach the top strap. Anchor brackets are installed for each second seating position. Anchor brackets 7−passenger models TO USE THE ANCHOR BRACKET: 1. Remove the head restraint. Anchor brackets 8−passenger models 154 2007 SIENNA from Oct. '06 Prod. (OM45437U)