now.. i'm not familar with Abrams tanks, but that cable dangling above the driver's seat and hanging off the headlights look like a slave cable used for trying to restart the vehicle?
Doesn't look like the vehicle was taken out in action. Might have been attacked while it was under tow or being repaired.
Water bottles might have come from the interior of the vehicle. Good thing about tracks is that you can carry all sorts of goodies in them.