WARNING: This page is about a different car, the 2016 Nissan Altima. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Exploded View Of Front Room/Map Lamp Assembly
Courtesy of NISSAN NORTH AMERICA, INC.
1.
Headlining
2.
Front room/map lamp assembly bracket (without moonroof)
3.
Front room/map lamp assembly bracket (with moonroof)