Chiasmata: Found Footage

That's definitely
1 2 3
4 5 6
7 8 9
  ?
You can see that  5 is 1 4, 6 is 2 4, 7 is 3 4, 9 is 1 8. The last symbol isn't 10, because that would be 2 8

Nice job figuringthat out!  That last symbol is most likely 0.

• See if there's any signs of wear and tear on that keypad to indicate the code?
  
• Does it look like Ash and Sam went this way?
  
• One of the rooms was "Stores", mught have supplies?  Also "Briefing" might hold information about this place?