Communications Tower - Dead Factory 2F (Resident Evil 3: Nemesis)

On top of the control panel at the front of the room.

If you jumped off the bridge outside the factory, Nicholai will appear in a helicopter.

If you jumped off the bridge outside the factory, Carlos will appear after your encounter with Nicholai.

Inside the smashed cabinet in the north west corner of the room, next to the door.

Inside the small cabinet on the east side of the room.