I don't comprehend hieroglyphics. What is the question. Do you have wiring diagrams? If not wander over to "MyMopar" and download one of the two-page aftermarket diagrams. These are not often as detailed or complete as OEM but somewhat easier to follow at times
Also wander around there and see if they have a 66 service manual posted. You may have to settle for Doge / vs Plymouth, etc
The two you have in your hand appear to be the ammeter connections. BE CAREFUL. They are hot at all times, large amp capacity, and ARE NOT FUSED. If you are trying to fire the car with the instrument cluster out, bolt then together and tape them off.
I haven't a clue what you are getting at in the bottom photo
