It's meant to be a sandbox game. The deeper you go, the more risks you take and the more rewards are available.
The more you search, the more you find. Where and how you search is important though, so you have to decide that.
Currently you're on floor 105, which has a group of 8 offices on the outside and a conference room in the center.
Additionally, there's a hole in the floor to the 104th from where Machete blew a big-ass hole in most everything.
The stairs go up to 106 where they end. The building itself is not a standard square building, but is a conical shape. Every floor is smaller than the one below it, so at this point, the main stairwell is running out. It's sort of like the Transamerica Pyramid in San Francisco.

You've got access to the building blueprint (part of the setup) so you know that the 106th floor is the executive atrium. There is very likely a security checkpoint there. The vault you're looking for is beyond that.
Something to remember is that Devoted is on canned air and is running out. If you try to spend the night, you will have to at least go down the tower to deal with the locals for more air, or he will risk FAB-III infection and permanent magic loss. That's your ticking clock. Each of you has a can of air in your gas masks that you could give him, but that's only a stop-gap measure. An hour left in each of your tanks. Enough to get out of the area still, but sleeping there could be a problem for him.
The stopoff on 105 was largely to get rid of the extra characters without players for a minute and to introduce the fact that building security is operational before you walked into it face first. Additionally there was the access to the building network.
Anyway, if you think that the wine vault is still the most important thing on the table and want to try blazing your way through the executive security, that's alright, but I won't pull punches. The whole point of a low power game is to try and keep you from brute-forcing your way through problems. If you want to find someone to play the team's face or muscle again, I can look around, but this is so close to being over that I don't know if I want to pull in more new players.
If you think I should, because you want to try talking to people again, let me know. So far, talking hasn't been high on anyone's list of solutions though.