This was an addition to an existing map that someone compiled of all the lock codes; this one was missing. Dunno if it will get added or if I'll have to edit the map to add it myself. I'm on my third playthrough, overlapping with the second. Of course I've modded the game, so I'm experimenting with what is possible (which isn't that much).

Aaah recall writing these down. I played twice, but did not complete it twice, an epic scale of a game.