Graco NAUTILUS SNUGLOCK LX Instruction Manual page 67

10. Attach UAS Connectors to Vehicle's
Lower UAS Anchors
Make sure that the red button faces away from
the car seat and the arrows are pointing up. The
UAS strap should not be twisted.
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11. Tighten the UAS Strap
Press down firmly on the top of the base while
rap
pulling on the free end of the UAS strap to
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remove all the slack.
Do not pull on the strap with excessive force.
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