Hello good afternoon,
Joining the blocks with the train Controller is very easy, it is done when you create a schedule,
therefore you have to be in edit mode,
in the schedule menu you select create schedule
Now in the dispatcher window you will have a new schedule
Selecting it and right button, properties, you can fill in parameters for its execution, giving ok, that window disappears and the block diagram remains, let's say off,
now you have to choose from the block diagram
To do this, you go to the dispatcher window and click according to the screenshot that I attach.
From here you select the start block, mark it as start
Select the next block and the path that joins them will light up, if not, click again on the first block and then on the second, and so on until you reach the destination block that you should mark as an end block.
It takes longer to write this than to do it, I hope I have helped you, even though I do not live in the USA
Best regards