Graco TURBOBOOSTER LX Instruction Manual page 33

4. Buckle the Vehicle Lap/Shoulder Seat Belt
Be sure the lap portion of the vehicle seat belt goes in
front of both armrests and the shoulder belt goes under
the armrest on the buckle side.
Be sure the lap portion of the vehicle seat belt lies low
across your child's hips.
Be sure the shoulder belt lies across your child's
shoulders, between the neck and edge of shoulder by
raising or lowering the head support. The belt guides
should be even with or just above the shoulders.
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