Welcome. There are exploded diagrams for your mower on many parts sites. Or, you can carefully take the opposite wheel off and observe what the parts look like and where they go.Thanks. I have the equivalent manual for my 20383
Thanks Oddjob ! That's the "magic" answer I was looking for. It's the only one that make's sense. (And I guess TORO made that connection as difficult as possible :-( It's sure not obvious.)
At least I know what I have to do next. Order the >>TORO<< WASHER + NUT for the other end of my ORIGINAL BOLT. Start to look at the machine and see how to do what you explained.
Thanks very much.