Lexus 2003 LS Owner's Manual page 182

COMFORT ADJUSTMENT
Using a top strap
16L303
Follow the procedure below for a child restraint system
that requires the use of a top strap.
168
16L304b

Anchor brackets
Use the anchor bracket on the package tray behind the rear
seat to attach the top strap.
Anchor brackets are installed for each rear seating position.
This symbol indicates the locations of user ready anchor
bracket.
Symbol