Graco TrioGrow SnugLoc Instruction Manual page 120

4. Push the LATCH Hooks Out
Through the Desired Belt Path
Openings on Each Side of Car Seat
Rear-Facing:
strap is in front of the buckle strap when the
buckle is in the inner-most position (A), and
behind when in the outter-most position (B)
and that it is flat and is not twisted.
A
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Make sure the LATCH
B