Graco NAUTILUS SNUGLOCK LX Instruction Manual page 88

6. Adjust the Belt Positioning Clip to
Lengthen
Fit Your Child
Shorten
Lengthen or shorten the belt length as
shown.
Clip should fit just above the top of shoulder
as shown.
Pull up on the shoulder belt to remove all
the slack. Be sure the lap portion of the
vehicle seat belt goes behind the armrests.
88