Bypassing the Amp gauge - Question about the MAD Electrical method

I have this one too and have studied it. What was throwing me on this one though is the feed from the batt going to both the starter and the starter relay and the single field alternator. I'm replacing what appeared to be bad connections and cleaning the engine bay up some.
If I understand the question is about the original system.
The Chrysler starter system has two stages.
When the ignition switch is in Start, power flows through wires S1, S2 and S4 causing the relay to close.
The Relay then connects Battery A1A to S5 which energizes the starter solenoid.
When the solenoid moves forward, the starter circuit A1 to ground, gets completed. A1 provides the battery power needed to turn the starter.
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