Toyota TUNDRA 2004 Owner's Manual page 129

Anchor brackets
Use one anchorage on the back of rear
seats and two anchorages on the floor as
shown above to attach the top strap.
Anchors are installed for each rear seating
position.
120
'04 TUNDRA_U (L/O 0309)
TO USE THE ANCHORAGES:
1. Remove the head restraint.
Outside position
Center position
2004 TUNDRA from Sep. '03 Prod. (OM34426U)