The one in the pictures above looks like the newer style Delco alternator.
Yeah, you have the black on the wrong terminal. Don't forget, your alternator is upside down from the picture, you have the black wire on B+ and it should be on B-.
Look this picture, also need to trace out the purple and red purple wires to make sure what they are, and replace them with something less taped together and the proper color.
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Personally.........I'd remove all the wiring and start over...........
Just my $0.02............