WARNING: This page is about a different car, the 2016 Infiniti Q50. However, it is still accessible from the selected car via links, so may be relevant.
Courtesy of NISSAN NORTH AMERICA, INC.
Retaining washer
Spacer
Seat belt adjuster RH
Anchor nut
Seat belt pre-tensioner retractor assembly (Driver side)
Anchor bolt
Seat belt pre-tensioner retractor assembly (Passenger side)