To be honest, I haven’t seen a thick black wire  like the one on the solenoid connected to a bolt on the engine. However, I did see a thinner one. Ill take a picture and see if I can post it.
As I mentioned earlier, should I connect a black wire from the negative battery terminal to a bolt on the engine just to see what happens?
Let me know, I’m open to all suggestions.
Thanks

Dad0202 ,AT this point, All I can say is ,you put the battery in place and attached the ground cable ,if you follow it back it should run to the right side of the motor and is held to the motor buy one of the bolts in the engine case, it should be almost the size of the cable that runs to the starter. if you can't see it at the place I described , you need new glasses or it's not there  . There is no neg.  terminal on the starter to connect to! there is only the positive terminal on top off the starter! You should not try to run a wire for a ground you should use the one that's there and properly sized which is the one we're trying to get you to look for.There is a small single wire coming out of the case on that side, it's from the neutral switch ,you need to look higher up and a couple of inch farther back in on the motor case to find the end of the ground cable.

It's quite possible that the switch isn't healthy.
But,
It's not as common as the Ground
Which is SUPPOSED to be on the right side of the engine, which you can't find.
So, if after the descriptions and explanations you can't find it, I'm gonna have to wonder if it's not there and you're gonna hafta find where it is, because that ground is important to the starting circuit.
Now, without even talking about the Size of the wire, can you find a wire that is bolted to the engine in the general vicinity of what we've been talking about?

It comes off the battery negative post, on the kickstand side of the bike and runs behind the battery box, to a casing bolt on the opposite side of the motor, the head of  bolt holds it to the right half of the center case(not the chrome side cover) ,this bolt should be about 2 inches higher than the oil sight glass and about 2 inches back in toward the center of the bike, on a level half way between the sight glass and the arm for the clutch, and just under the chrome cover for the tool kit . you may need a flashlight!

I'll check it out when I get home today, weather permitting. If I can't locate it, do I have the option of connecting one from the negative terminal to the engine bolt mentioned? I assume it would be what I need to solve my problem and after giving it some thought, the guy I bought It from said the starter worked now and then. Maybe the wire is hidden somewhere and not making contact as it should because of a loose and/or dirty connection. I'll do some investigating.
Thanks again for everyone's help. Like I mentioned earlier, I'm trying to stay away from the repair shop because they want $95.00 an hour and I'm sure it's an easy fix.

Thanks for the words of wisdom. I appreciate it.

I'm certain that it's not there. The top one (smaller of the two) is there like I mentioned earlier but not the thicker one near the bottom. Thanks for the photo it helped a lot. I appreciate it.