Lexus LX 470 1998 Owner's Manual page 130

(B) Convertible seat installation
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A convertible seat is used in forward−facing and rear−facing
positions depending on the age and size of the child. When
installing, follow the manufacturer's instructions about the
appropriate age and size of the child as well as direction for installing
of a child restraint system.
COMFORT ADJUSTMENT
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1. Run the center lap belt through or around the convertible seat
following the instructions provided by its manufacturer and insert
the tab into the buckle taking care not to twist the lap belt.
CAUTION
D After inserting the tab, make sure the tab and buckle are
locked and that the lap belt is not twisted.
D Do not insert coins, clips, etc. in the buckle as this may
prevent you from properly latching the tab and buckle.
D If the seat belt does not function normally, immediately
contact your Lexus dealer. Do not use the seat until the seat
belt is fixed. It cannot protect your child from injury.
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