I'm trying to assemble this Raleigh branded Suntour GT, but I'm missing some understanding, and, maybe, some part. I picked it up at my co-op a couple of years ago, and it may not have all the original fittings. The claw didn't come with it.

I don't understand how to tighten it onto the claw and still allow it to pivot. I've never assembled a derailleur with a claw and a jam nut. I'm not clear what the jam nut is for, since integrated hangers don't seem to need one.

I've included a picture of the fittings placed in the order I've tried for assembly:
pivot bolt, then 2 thin washers, then derailleur body, then thin washer, thicker washer, then pivot bolt threaded into claw, then jam nut. It also had the tabbed washer you see above the thicker washer, but I don't understand what that's for, or where it goes. If I include it there's not that much thread left for the jam nut.

When I pulled this out of my parts bin, I thought this would be a no brainer, but I forgot who I was dealing with.