Volvo 2008 V70 Owner's Manual page 192

NOTE
In order to return a removed hook into a rail, it must be press down lightly.
Reinserting a hook
It is important to insert the hooks correctly in the rails. The hooks' openings should point away from each other.
The opening on the hook closest to the rear seat backrest should point toward the backrest.
The opening on the hook closest to the tailgate should point toward the tailgate.
WARNING
The hooks must be installed correctly in the rail. Incorrectly installed hooks will be folded down by the strap,
allowing them to move. The load will then no longer be securely anchored.
Straps for securing loads
Wrapping straps a full turn around the hooks helps keep them in place.
NOTE
The straps should preferably be approximately 1 in. (25 mm) in width.
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05 During your trip
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