The broken piece (glue between 12:00 and 1:00)

Where it goes (I had to hold the material to show through the openings...)

Thanks for any info!
Moderator: JCOOLEY
From the second picture in my first post, it looks like the nut helps to keep the layers straight, and to prevent water from getting in. The black cap does screw in. (I think I did it... it's been a few hours since I tried setting it up, my brain is already turning to mushNaturalPath wrote:You could also just leave the nut off altogether, it doesn't really have any critical structural value. If the black cap does screw on, just use that part and leave the big nut off, although the black cap would then be a loose item any time you removed it.
I do see some cogs on the inside of that damaged ring, so maybe I'm wrong and this part can be replaced. If so, I'm sure that someone will point that out.