Square-Gates

Square-gates are the equivalent of Tri-Gates in Halo 3. They have been found on the multiplayer level Sandtrap.

How to see Them
You need to get out of the map in theater by using Pan-Cam, specifically under the map, and then make the map de-load, and then they should be revealed in areas in the walls of the main hallway. Also, far underneath the map, there are two green square objects that are underneath the air lifts. They are assumed to have the same effect as the Da Vinci Code Cubes on the map Heretic.