In the infested warehouse is on a wall actually outside the facility on the shore of the acid lake, facing a broken concrete slab with a green weapon chest. The first switch is Under the acid-soaked railway on the middle support pylon holding up remnants of the old rail above the caustic lake. Now you’ll need to follow clues that lead to finding 4 switches located in Caustic Caverns.
Each time after killing bandits you’ll get a short story from Brick and the forth will be traveling to Caustic Caverns.
