Need help identifying wire 5A to finalize 210 amp alternator conversion

[Outfitters]

My install is complete...but before I hook up the batteries and test the system I would like to get some confirmation from the experts.
My wire 5A has no label...middle of the photo...above the large red boot...it has red heat shrink on it and it is attached to the IGN on the regulator and appears to be 8 gage. I am almost certain this wire is 5A....please verify.
This wire was the alternator out for the old 60 amp alternator... I have read that the 200 amp does not send power through the PCB (I have just installed a Nartron Smart Start System with yellow band GPC (and new glow plugs).
I am confused how this wire "changes function" when the alternator is upgraded to the 200 amp from the 60....(it was the alternator output and now is the IGN?)
Thank you in advance for your timely replies.

 

[Outfitters]

well that unlabeled wire must be the 5A since everything is working perfectly now! It sure is nice to wrench and have the outcome work as planned... I am still confused how the output wire from the 60 amp alternator becomes the IGN wire when the 200 amp alternator conversion is done. I would really like to know if someone has a way of explaining it without requiring me looking at electrical schematics.

 

[Action]

Could it be that the wire only puts out power when the starter switch is in the RUN position? Or when the engine is running. It doesn't have to mean the wire goes TO the ignition.

 

[desmodromic]

well that unlabeled wire must be the 5A since everything is working perfectly now! It sure is nice to wrench and have the outcome work as planned... I am still confused how the output wire from the 60 amp alternator becomes the IGN wire when the 200 amp alternator conversion is done. I would really like to know if someone has a way of explaining it without requiring me looking at electrical schematics.

Any other theories in response to the above question?

 

[cwc]

Wire 5A connects to wire 81A through the PCB/EESS box. Wire 81A is connected to the starter positive post, which is connected directly to the battery 24V+ post. When the logic is satisfied to make the relay in the control box close, then 5A is connected to the battery 24V+ post. So it can either provide a signal to the alternator (as in the case of the 200A Niehoff) or carry the charge for the batteries for the lower-amp alternators. Note that the wire size is at least 8 gage through the entire circuit from the battery to the alternator. The 8 gage wire is overkill when it is just providing a voltage signal.

Here is a section of the wiring diagram showing this connection (this is the "Kascar" diagram with 200A alternator):



In this context, the term "Ignition" or "IGN" should be understood from the perspective of the alternator, not the engine. The Ignition terminal gives the alternator a signal so that it can function and in a sense it "ignites' it.