WARNING: This page is about a different car, the 2005 Nissan Quest. 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.
Service Joint
Fig 1: Identifying Front Side Member Service Joint (1 Of 2)
Courtesy of NISSAN MOTOR CO., U.S.A.
Service Joint
Fig 2: Identifying Front Side Member Service Joint (2 Of 2)