More concerning is what appears to be wear from the flipper dragging on the left. Since it's not collector quality as you said, why not leave the hole and just put a piece of mylar over it? If the post is original (I'm not sure on that) when you sell it just carefully lift the mylar and put the post back. A small square of mylar sdtm isn't going to affect gameplay.

No Fear came with a post hole and a cover from the factory. Maybe you can find one from someone who installed the post.

I don't think TZ came with a post, but could be wrong with samples/protos etc.

Which path you choose is really up to you. Do you want a project or to just get the game working w/o the post. You should be able to find a plug at Home Depot, Ace Hardware etc.

I don't remember that from mine?

Perhaps it is just an issue with the image, but it looks like a grey wear spot just below your left flipper in the outermost black ring. It could be nothing. Or lint.

Thats the holes u use to line up the flippers