Terminal 7 | Midnight Halo 4 Guide

Go out on a long corridor and destroy Watchers and a laser. Turn left on crossroads. Kill Knights behind door and turn right. In front of you, you'll see some sort of columns. Between them you find the last Terminal. Pick up Autosentry on your way.

After using it, turn right and kill enemies in the next room. Then, turn left according to Cortana's advice. You enter a room, where you fall down. Pick up ammo/weapons from stand in the corridor. Activate a panel on right to open a portal. Go through it.