Oh, it's insanely buggy. The idea is that you can connect the bottom of your attached cargo container to the next cargo container, but the popup doesn't show up properly. It should still connect as long as you're connected to the top of the cargo containers. I also managed to crash the game by connecting to the bottom of a cargo container, so there's that too :(
BRICKED UP! I'm not at all sure if adding bricks actually does anything. Also I had no idea I could even buy guns the first run, so it was very confusing being a target and running away.
