This is where I (and many others too, it seems) got stuck as well. This was my one complaint about this game; that the clues to solve this were too vague. Even if you think you have the location code, you still need the name(s) and the timeslot to find that last scene. (I discussed this problem and some suggestions to fix it in my review earlier in these comments. Feel free to read that once you have solved it.)
Since you only want a small nudge to the solution, I'll tell you the scene that imho fails at giving the hint to the final scene is:
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25-AT-1
(Edit March, 2025: The update fixes this issue.)