Non-separable headlights
1. Remove the front grille.
2. Unscrew the ring nut.
3. Remove the headlight and disconnect the wires.
4. Installation is carried out in reverse order.
Headlights with replaceable halogen bulbs
5. Disconnect the battery from ground.
6. Disconnect the connectors (photo).
9.6 Halogen lamp mounting parts
1. Reflector; 2. Glass flask; 3. Lamp; 4. Fix; 5. Press and pull out; 6. Connector; 7. Ring nut; 8. Turn inside out; 9. Plastic base; 10. Cartridge
7. Turn the ring nut counterclockwise until it releases from the latches and remove the lamp from the optical element.
8. Installation is carried out in reverse order.
Data copied from web resource [NissanBook]