If you switch the maps for the male and female bathrooms in the middle of the New Ark City underground mall, the male and female stalls will be head to head so you can put a glory hole in the enter-able stall there. Easy implementation, but a glory hole might be more thematically consistent in the slums. I can't say from experience.
Actually, an even easier implementation (I imagine) would be to swap the text's and loading zones' position in their shared foyer. Move the (four, I'm guessing; two loading zones and two text) objects in that central mall room, and the setup is done.