Hauptstrecke Rhien-ruhr (picking The Corresponding Route)

Hi folks. I'm having trouble understanding what route i should use when setting up the destination board on the new route. For example, the RE11 Duisburg Hbf - Bochum hbf i have two options to pick for RE11. The RE11 M'gladbach Hbf or the RE11 Hamm (westf) Hbf. Which one do i choose? Does it depend if I'm travelling east to west or vice versa. Seems complicated or mabye i am making it out to be. Help?

 

Look at Wikipedia:

https://de.m.wikipedia.org/wiki/Rhein-Hellweg-Express