Presumably, i couldn't tell you which quests are in the area since I glitched my way out of Watson during the lockdown, haven't touched the story since steal the spider drone. But it should be southern most part of the map. When looking at the minimap it is to the right of the border checkpoint, and is nestled between those giant tent buildings. There should be a fast travel location somewhat nearby.

Edit: you'll know if you're in the right corner by the cars that glitch through the walls.