Old rusted wiring connections

Just FYI it is Mattax not Mattox, but I found the posts. Very informative. Initially I was only looking for advice in removing the connector, so I could just plug the new harness in, not removing terminals. Not I'll look at removing the terminals and redo them like you mentioned doing. Thanks.
LOL he's lucky I didn't call him Mannix. (Old TV detective series, with Mike Conners)