The process to select a ticket from this automat is actually quite tedious. It will begin with the starting station and make you go through a series of alphabetical lists to select your starting station. Then you have to go through the same process for your destination.
If you see one of these automats and you have some time, it wouldn't be a bad idea to get some practice for the day you want to do it for real.
Expresskauf probably assumes you want to go from this station and gives you a selection of major cities for you destination.
Note, there is a touch pad for the Sch�nes-Wochenende Ticket. If you select this option, you will go to a page where is asks you if you want the ticket for the next following Saturday, or the next following Sunday, or some other date. If you select "other date", it will bring up a series of calendar pages to select from.
If you select L�nder Tickets, it should bring up a screen showing all of the available L�nder Tickets. You will also have to select a date for the Ticket.