How to connect the Chaybay mini sightseeing electric train head with it carriage?

1. Get the connecting rod
2. Connect this head to the carriage
3. Insert the screw
4. Use Screw washer and screw to lock it
5. Connect the another head to the locomotive
6. Use Screw washer and screw to lock it
7. Connect the LED cable line and power cord(if there is)