I have a consist of 20 coal cars. On a siding I have 30 more coal cars. I am trying to have the train with the 20 cars go to the siding and back into it and couple to car #21. For some reason I can't get it to do that. If I uncouple my loco from the 20 cars and give commands to couple to car #21 it does just that. I just don't know how to couple a train with several cars to another string of cars. Running TS2010EE. Is there a command to couple to a car number or something like that? Any help here will be greatly appreciated......