PACE slot help

[rrkb2005]

I have a PACE slot machine that I think might be missing the pin that pushes the coins to the cash box when the payout tube is full. Does anyone have a picture of the goose neck or instructions of how it should be? I know several mills are built similarly as well. This is the only thing I haven’t been able to fix. Any help is appreciated. I attached a photo of mine below.