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WARNING: This page is about a different car, the 2017 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Rear Disc Brake Unit Disassembly And Assembly With Torque Specifications
GNSAWFIA1031ZZ-031Courtesy of NISSAN NORTH AMERICA, INC.
1. Sliding pin bolt 2. Sliding pin bolt bushing 3. Cap
4. Bleeder valve 5. Brake caliper body 6. Piston seal
7. Piston 8. Piston boot 9. Sliding pin boot
10. Torque member        
A. Rubber grease        
OIL Apply brake fluid