I doubt the aim is to catch moles. it would only take one who then makes the info public, then there wouldn’t be any need for most moles to open the box in their congregation. It’s too much work to go to when there are simpler options.
The day of opening coincides with a monthly broadcast so it sounds like there will be an announcement.
It possibly has something to do with the one public Watchtower and Awake for 2024. They’ll probably hype up the articles to make it kinda, sorta, sound like a hailstone message and the Awake magazine presenting all the doom and gloom from the past 100 years.
I think it’s a possibility because it won’t matter if the box gets open and read or made public because it won’t say anything more than what they’ve said at one time or another in the past. The November broadcast however, could make it seem like it’s much more than it actually is, that is, they’ll hype it up.