Today I used some of the "DeOxit" on the female terminals and blew it out with compressed air. The male spades were cleaned as well. I used a file to scrape even though there was no corrosion, only some tarnished copper.
I expected there to be more gunk since the car is 43 years old. I did have the harness out in 2002 when I painted the car and engine bay. maybe I cleaned them then? Heck... that was 11 years ago!