Final answer:
The filled bags are placed at the head end of the station to ensure easy accessibility for loading onto the train.
Step-by-step explanation:
The most likely reason for having the filled bags placed at the head end of the station rather than the other end is to ensure that the bags are easily accessible for loading onto the train. Placing the bags at the head end of the station allows the train staff to efficiently load them onto the train, as passengers can easily reach and hand over their bags. This ensures a smooth and timely departure of the train.