Opel Astra 2013 Owner's Manual page 70

68 Storage
Check the cable and lamp position to
make sure these are correctly
installed and are securely located.
Lock the rear carrier system
Swivel the right clamping lever (1)
first, followed by the left clamping
lever (2), until a resistance is
noticeable.
The rear carrier system is locked
when the clamping levers are
swivelled by approx. 50°. Otherwise
safe functionality is not guaranteed.
Note
Close the tailgate.