Pretty decent that pal especially the cells, the Locking mechanisms are the same at the Prison I worked in, wether they had a Self locking latch i.e you'd need to shoot the bolt on entry to avoid it locking behind you, or if it was key Manual locking I can't really tell. The little disc with the white line on it basically tells you that the Latch locking the bolt is either open or closed, it does require a knack believe it or not to open and lock them doors properly haha. basically the doors I used you had to insert key, twist key, turn handle, remove key = Door open but latch locked, or insert key, turn, twist handle, open door, twist handle, remove key, this locks the bolt "shooting the bolt" as we call it, and then the cons couldn't lock you in haha
nice to see though