Verdanak reloaded: Small shack with keypad?

I haven't heard anything about this, but I found a small shack in warzone casual that had a keypad on it that you can interact with... Is there a challenge I am not aware of. I looked it up on the net generally but didn't see anything on it. If I remember correctly it's on the hill with the s turn next to TV station. I'm gonna try to find it again. If anyone knows anything about it please share. I'm invested.