To fill a train car, you need to completely load two crates that are placed directly next to each other. If there's a gap between crates, they won’t count as part of the same car.

• Filling crates individually gives you rewards and player XP.

• When you successfully fill 2, 5, or 7 full cars, you’ll receive additional rewards like dollars and Cargo Train XP.

• If you fill 7 crates in 7 different, non-adjacent cars, you won’t receive any bonus when the train departs.

To maximize rewards, focus on filling adjacent crates to complete train cars rather than spreading crates across separate cars.