Ignition wirng harness

Yes, when the car dies and I try to start, I GET no current at starter. I wiggle the under column connector and it will make connection where ever it is bad and start. I see nothing burnt at the connector. Which wire feeds current to the ign switch blue/brown wires? and yellow wire that goes from switch to starter relay? That large hot wire at connector? right?
The large hot wire at the connector is feed from 4 way splice right????