Simpson dryer Maxidrive 105 black belt has come loose?

Hi I am just trying to work out how the belt fits on the runner wheel inside my Simpson dryer. I think it needs to be replaced as it is a bit cracked but it was loose in the back of the machine when I took the back off. A metal bracket with a wheel attached I presumed is for the belt to go on but I dont where it is supposed to be fitted .This was also sitting in the bottom of the dryer(we have reversed the dryer to fit in the space. Cheers thanks for your help Sue