WARNING: This page is about a different car, the 2009 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Rear Disc Brake Replacement Components With Torque Specifications
Courtesy of NISSAN MOTOR CO., U.S.A.
NOTE:
Do not remove the torque member, pads, shims, shim covers, and pad retainers when disassembling and assembling the cylinder body.