I need some help. I have a blade for my 122 that I have never installed on it. I bought it after I puchased the tractor. I thought I had the correct subframe for my tractor - bolt on instead of quick attach. I removed the mule drive bracket and started to bolt it on. It doesnt fit-see pics. Do I have the wrong bracket? The blade set up instructions are not much help. I am thinking of fabricating a bracket. Please advise! Thanks, John