Toyota 2001 Tundra Owner's Manual page 76

Follow the procedure below for a child
restraint system that requires the use
of a top strap.
'01 TUNDRA_U (L/O 0008)
Routing devices
Symbol
Anchor brackets
Use the routing device on the rear of the
seat back and the anchor bracket on the
side floor to attach the top strap.
Anchor brackets are installed for each
rear seating position.
This symbol indicates the locations of
user ready anchor brackets.
2001 TUNDRA (OM34416U)
TO USE THE ANCHOR BRACKET:
Outside position
1. Remove the head restraint.
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