Map: Maint Tunnel

 is a note in Prey.

Transcript
Divya, I'm trying to get into Graves' office to override the door to fabrication! I have his keycard but he's not responding. If you don't hear from me there's another way out. There's a passage behind a panel in the upper labs. It leads to the volunteer quarters. You should be able to escape that way. I also managed to figure out the access code and password for the security station near the entrance. Code: [random number] Password:WunchangGui Good luck!

- Frederick

Location
This note can be found on Divya Naaz's corpse in the Atrium of the Neuromod Division, only after starting the Copy Protection quest.