Aston Martin One-77 2010 Owner's Manual page 45

Each seat has three point, inertia reel seat belts
installed. Items 1, 2 and 3 show the three points of the
seat belt. Item 3 is also the location of the belt buckle.
The inertia belt reels will automatically tension the
belts to provide security with comfort. In the event of a
collision or during severe braking, the belt reels will
lock.
Pull out the seat belt, drawing the tongue over the
shoulder and across the chest.
Push the tongue into the belt buckle latch until a
positive click is heard.
Pull upwards on the diagonal belt to make sure that the
latching is secure and to remove all slack from the belt.
Finally, double check that the lap belt is installed
snugly, low down across the hips, and that there are no
twists.
If it is necessary for a passenger to adjust their seat or
seating position during a journey, the belt tension
might be disturbed.
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