Graco TrioGrow SnugLoc Instruction Manual page 72

11. Attach LATCH Hooks to Vehicle's
Lower LATCH Anchors.
LATCH strap should not be twisted.
12. Tighten the LATCH Strap
Press down firmly in the center of the car
seat while tightening the LATCH strap to
remove all the slack. Do not pull on the
strap with excessive force.
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