The 3 wire connector in the 2nd pic looks like it's for the high beam. Should be another on the other side of the car. Should also have a 2 blade connector on each side for low beams.
I had a 70 wiring diagram but my laptop got wiped out a few weeks ago. I'll look on the other computer and backup drive to see if I can find a copy.
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Hank
70 Chevelle SS396(454), M20, 3.73
My Chevelle
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