Simply put, it is simple to connect the vehicle.First of all, each compartment has the front and rear link directions. If the direction is wrong, it cannot be connected.The tool for linking is a crowbar.First of all, you need to put two compartments in the same position.Then click on the left -button trunk in the first carriage.The perspective of this process should be tribute to the second carriage as possible, because this will choose to close the connection point of the second carriage.Then use a crowbar to click on the second carriage.In the same way, the perspective should be biased towards the first carriage.Then the connection is completed.