It's the one in the central part, in the right corner of the map. After doing the trash collection quest, you can remove the trash there and push one of the fences to enter that building there.
No worries and hope this helps!
ah k thx also i have a question is does suken coins quest only have bad end rn?
No, the quest also can be finished but you need a special key item that you get in a different quest.
Thx I just realize from finishing the angel quest
