2003 Toyota Sienna Owners Manual - Page 113
2003 Toyota Sienna Manual
Page 113 highlights
03 SIENNA_U (L/O 0207) Anchor brackets Second seat (left side only): Use the anchor bracket on the floor to attach the top strap. Anchor bracket is installed for left side second seat. Third seat: Use the anchor brackets on the back of the third seat cushion to attach the top strap. Anchor brackets are installed for each third seating position. TO USE THE ANCHOR BRACKET: 1. Remove the head restraint. Second seat (left side only) Third seat 2003 MY SIENNA (OM45410U) 113