Graco NAUTILUS SNUGLOCK LX Instruction Manual page 68

12. Attach Top Tether Strap
Extend the top tether by pressing the grey
button and pulling out on the strap and
attach.
Consult vehicle's owner manual for specific
location.
13. Tighten Top Tether Strap
Remove all the slack.
14. Thread the Vehicle Seat Shoulder
Belt Through Seat Belt Guide on the
Headrest
See section 5-B to secure your child.
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