I've got my first Pachinko machine. It's a 1969 Nishijin A single shot. After some minor tinkering with some levers on the back (and watching lots of the helpful videos on this site), it's playable. But there's a bit that I can't figure out what it's doing and therefore wonder if it's set up right.

Here's a photo. It's the bit I'm pointing to. This is directly below the jackpot seesaw. It just rocks back and forth freely and doesn't appear to be attached to anything.

The lower part (right where my finger is) can touch that seesaw right below it. But it just rocks back. There's no way to lock it in place. And if I could lock it, it would lock the jackpot seesaw in place preventing any jackpots from triggering.

The upper part has a few little arms coming off it. One is right below the lever that triggers the ball feeder. The other is up above what appears to be a weighted stop that regulates balls rolling down into the jackpot area.

What is this for and is it setup properly?

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