Graco TURBOBOOSTER LX Instruction Manual page 29

2. Extend the Lower Anchor Straps.
For easier installation, extend the lower anchor straps to
their maximum length by pressing the red button on the
front of the base and pulling out on the straps.
3. Attach Lower Anchor Connectors to Vehicle's
Lower Anchor Bars.
Lower Anchor straps
should not be twisted.
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