alternator belt replacement

Howdy everyone. I've got an 2007 R1200RT (date on the plate says 0507) and I'm confused about the alternator belt. Supposedly, a Contitech 4PK582 belt is the correct one, but I ordered a couple and installed one without checking too carefully. Went riding, and it appears the the belt walked...

Has anyone found or posted a video on how to replace alternator belt on a 2016 R1200RT??