73 Dart Alternator doesn't show charge anymore.

That wire looks like hell. Why no voltmeter? You can buy them at ANY hardware store, Lowe's or Home Depot. Just about any auto parts store that has the gall to gall itself one will have them.

You can get a decent but cheap Klein for 15-20 bucks. While you are there, "somewhere" get into the electrical connections and find either a few alligator clips or some alligator jumper wire leads.

I don't recommend Horrid Freight but they have that stuff, as well