Hi, well this past Sunday I was playing the organ and all of a sudden I felt something hit my hand. When I looked down, there was this black string on the keys. I picked it up and my hands were covered in black oil or something. I looked over and the horns had stopped spinning. I know I can buy another belt, but how do I put the belt back on for the Upper Leslie Belt (around the horns). My Leslie is a 22H. Thanks.