72 Scamp wiring to ballast resistor question

Here is the deal. The older, original Mopar electronic ECU needed 5 pins and one of those got power from a resistor, incorporated into a 4 terminal dual resistor. By the way the two resistors are different values

Newer ECU boxes only need the same 2 pin resistor as breaker points, BUT a 4 pin box can use either the 4 pin resistor and harness, or a 2 pin resistor and harness

You cannot always tell a 4 pin from a 5 pin box "by looking" because many newer 4 pin boxes have 5 physical pins. You must check resistance from the "5th" pin to the box ground and the other pins to determine if it is "open." (not connected)

Colors vary, but most years use dark blue from the firewall as "ignition run" coming out of the bulkhead and fed from the ign switch. This wire may have a second one branching off from the resistor, and that feeds the VR, the alternator field (70/ later) electric choke if used, and smog doo dads on some years

The second terminal goes to the coil + and this has a second wire, normally brown, branching off from that terminal. This is the resistor bypass during starting, activated when the key is twisted to start, and feeds the coil hot full battery power for starting.

It matters not which end of the TWO pin resistor these are connected. The 4 pin resistor is a different matter