A new set that goes off the side of the new bridge. It’s the Captain’s Office. I’m not calling it a Ready Room, besides the fact that it’s a silly sounding name, it was also a wrong usage of the actual military term.
Also, no, you don’t have to search the archives. I’ve never mentioned Kalybus in comic before. It’s information Marty picked up on his own during his time as a Sith.