They’re probably meant to live in one of the inaccessible parts of the big factory building. There’s even a whole tower on there. Since it’s a company town this would make perfect dystopian sense.
One thing that would have helped immersion in all the cities (and the Den) would have been to schedule the citizens and minor named NPCs to take an elevator to an inaccesible floor with an empty room for a few hours. If they could build all the space for that would be cool, but especially for the unnamed NPCs it might be impractical.
There’s not even a bathroom in that place. Given the external size of the station, they should have just put a couple inaccessible doors somewhere in there (maybe next to the bar and in the junk corridor) and it would be fine.