Exit the train and extract two First Aid Kits out of the Health Station in the room to the right—one from hacking, then a second through vandalism. Loop around the rear of the train to find some ammo in the corner of the area before heading south for the Drop.
Hack the door and continue past the Gene Bank to the door to the west. Enter this next room quietly so as to not disturb the cultists performing their ritual up ahead. Line up a clean shot on the one nearest to your position and hurl a few fireballs at them, then open fire with the Rivet Gun to put them down. Scavenge the corpses and use Telekinesis to collect the money and Heavy Rivets behind the bars to the left.