Positive coil wire

The VR you pictured is for 70 and later. For that you will need a 70/ later alternator which has two field connections. As stated, the key switched 12V is a blue wire coming out of the bulkhead, and goes to the ballast. That wire is the ONLY source of keyed 12V which is ONLY hot repeat ONLY HOT in ONLY the run position of the key. For starting, there are TWO wires involved that are hot ONLY in the "start" position of the key. One is the yellow start wire, which ONLY feeds the start relay to actuate the starter. The other, normally brown, IGN2 at the key, is the coil resistor bypass circuit for starting. THAT wire MUST go to the coil + side of the ballast resistor.

Be aware that there are several solid state ignition diagrams which are WRONG as they try and get the start wire to act as the bypass wire. THIS IS IMPORTANT to avoid, as the two circuits are ISOLATED so that the coil power in the "run" position DOES NOT BACKFEED to the starter relay!!!

THE BALLAST AND COIL WIRING in the 69 manual is exactly the same whether using breaker points or Mopar breakerless