A while back I made a post about this, but could not post the photo. So here it is the disk I found under the map (potato quality)

Battlefield 4 General Discussion
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2

I don’t even know what I’m looking at.

3

Same, I came here to look for an answer but I don’t think anybody will know.

4

if you’re on locker then that is most likely the main menu / start menu that is hidden under the map.

5

I believe that’s where the camera pans to once game is over