As you enter this room, look to the right to spot the terminal.
I saved and quit and when I loaded back later, I started at Two Betrayals. It's up to you how you want to navigate this section. Would It’ve Killed You To Take The Elevator* Halo CE: Beat the par time on Assault on the Control Room. Also still don't know if it's a cool idea to revisit almost every level … No difficulty requirements, so you could even do this on Easy for 10G. Make sure you have full health or you will die.
