See also:

Seat belt extenders
If, because of body size or driving position, it is not possible to properly fit the lap/shoulder belt and fasten it, an extender is available which is compatible with the installed seat belts. ...

Shoulder belt guide (Coupe)
The shoulder arm can be adjusted to allow easier access to the shoulder belt. The arm can also be folded down to allow rear seat passengers easier access. ...

Injured persons
NISSAN recommends that injured persons use seat belts. Check with your doctor for specific recommendations. ...