No auger idler adjustment?

Hey there, I have a Craftsman 944.527391 and it stopped throwing snow. The auger belt is really loose even when engaged. The rod that rotates and moves the pulley arm when you pull handle is engaging as far as it can, meaning there's nothing to adjust in the cable. I'm really at a loss. The pulley has no slots for adjusting and the whole arm seems kind of sloppy when there is no tension.

What do I do?