Bally Bill & mazzeosa17 thank you for your helpful comments and photos. I'll just set that extra piece aside for now since it is not needed.
Bally Bill, I was able to get coins loaded just fine from inside as was suggested. And, yes, I had first pushed in the lever that resets the jackpot. One of the YouTube videos by "Mantiques" that I had watch many times shows that.
First question: You mention a bracket circled in red that needs to be straightened, but I'm not seeing a red circle. I see a couple of yellow circles. One in the pic of the jackpot components and the other in the pic of the manual page 17. So, I'm not sure what bracket you're referring to?
Second question: Yes I had seen that the screw is missing that holds the jackpot assembly to the front of the machine. Do you have any idea what the specs for that screw are? Is it a machine screw? I have tried an assortment of screws from my collection but haven't found one yet that fits, and I'm reluctant to force something and mess up the threads if it's a machine screw.
Last question, thank you for pointing out the missing 'jackpot activating post'. I never would've seen that since I don't have a manual. Will the machine operate without that part? In the meantime, I'll see if I can find that missing part on this forum somewhere or on eBay. By the way, I did send an email to Liberty Belle Books and got this response: "Your message couldn't be delivered to
mfey@libertybellebooks.com. Their inbox is full, or it's getting too much mail right now." Maybe I can find one of this forum.
Thanks again for all the help you and others on this forum are providing.