Then take them completely apart, every piece.
You need to fiddle with those things until you 100% know what everything does.
The three discs are just like a circle, square & a triangle block.
Only the square block will fit through the square hole, you should have been able to figure that out in under 30 seconds, that may sound a bit rude, it's not meant too.
It just tells me you need to figure out what everything does, if you have a problem out on the hill somewhere. YOU NEED to be able to figure it out.
Learning this shit while you sit on the couch, is far easier than on the side of a mountain, in a blizzard, whilst it's getting dark & starting to rain.
If whatever doesn't kill you, only makes you stronger.
Then I am so close to immortality