WARNING: This page is about a different car, the 2014 Nissan Armada. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Intelligent Key System/Engine Start Function Wiring Diagram (1 Of 3)
Courtesy of NISSAN NORTH AMERICA, INC.
Fig 2: Intelligent Key System/Engine Start Function Wiring Diagram (2 Of 3)
Courtesy of NISSAN NORTH AMERICA, INC.
Fig 3: Intelligent Key System/Engine Start Function Wiring Diagram (3 Of 3)