I have included in the diagrams down below a Technical Service Bulletin (TSB) for your vehicle's rear shocks from Nissan, as well as step by step instructions on the removal and installation of your vehicle's rear shocks. I have also included a link below for you to go to:
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.