I noticed that there's a control panel, which you can use in Crossing. The "problem" is that I don't know what it does. When you use the control panel, the keyboard turns from green to red but does anyone know what else does happen?

How to find it:
Go to the bottom right edge of the map. There should be a truck next to the "Return to battlefield" line. You should see a Korean building, which is slightly bigger than the other Korean buildings found in the map. The side, which is closest to the truck should see a door you can kick open - and another door you can kick after that (You don't need to kick the doors in order to get in though). You should see a control panel and a map inside the building.

It reveals the enemy location on your radar. Really useful for the start of Frenzy rounds.