belt broken for Regal Kitchen Pro bread machine K6725?

So, I figured, how hard can it be to fix a belt? Then when I removed the broken bits of belt, I noticed a string, figured it was part of the belt and started to unwind it from around the spindle attached to the motor. But the string is very long, and is wound tightly and neatly around the spindle like a spool of thread! Odd. What is this? What does it do? Does it come with a belt (assuming I can find one for this model).