WARNING: This page is about a different car, the 2005 Nissan Altima. However, it is still accessible from the selected car via links, so may be relevant.
Work after hoodledge and radiator core support have been removed.
Fig 1: Identifying Front Side Member Service Joints (1 Of 2)
Courtesy of NISSAN MOTOR CO., U.S.A.
Fig 2: Identifying Front Side Member Service Joints (2 Of 2)