I am stuck as to how to reattach the belt to the mower deck. It is a twin-blade 36" and there is an idler pully. Anyone know how?

I am stuck as to how to reattach the belt to the mower deck. It is a twin-blade 36" and there is an idler pully. Anyone know how?

Well, I finally figured it out by trial and error and laying there for two hours thinking and trying combinations. It's really quite logical!:)