You have corrosion inside the positive starter cable. This will require you to cut open the cable insulation at the positive post connector. As long as you keep seeing green, keep cutting. Soak in coca cola agitating every few minutes. change the coke out often. You can also use baking soda and water.
The grounding strap, cleaned at both ends, what about the middle? Is it green?
But since you say that it starts every time you jumper the 3 wire terminal on the passenger side, it's probably cause the hood is open
,,, no just kidding, could be that somewhere between the ignition switch and the 3 wire terminal you have a bad wire, you could try replacing the wire.
This is of course after you follow whunters suggestions,,, first.