WARNING: This page is about a different car, the 2007 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Rear Seat Replacement Components With Torque Specifications (5-Passenger)
Courtesy of NISSAN MOTOR CO., U.S.A.
Fig 2: Rear Seat Replacement Components With Torque Specifications (4-Passenger)