John Deere M snow plow (blade) questions?

I have a front blade for a john deere m. I think the model is a M32 blade.
The problem is the mounting points for the back of the arms, that attach to the tractor
have been cut off. I'm restoring this blade but can't find any info or pictures how it mounts.
Any info would help so I can fab up the parts I need,

DO A MOCK INSTALL. LINE EVERYTHING UP AND MARK ON BLADE WHERE THEY WOULD INSTALL. GO OFF OF EYE IF YOU HAVE TO. THEN WELD