WARNING: This page is about a different car, the 2008 Infiniti M45 and 2008 Infiniti M35. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Intelligent Key System/Engine Start Function Component Parts And Harness Connector Location (1 Of 2)
Courtesy of NISSAN MOTOR CO., U.S.A.
Fig 2: Identifying Intelligent Key System/Engine Start Function Component Parts And Harness Connector Location (2 Of 2)