Alternator question

Need to make sure I'm reading this correctly; spade wires disconnected and alternator now cold.
Sorry I'm late, fighting kidney stones and can't get to my archives yet.

Make sure that purple wire is dead with key switch off, Hot with keys witch on.
This wire is your exciter wire. It helps enable the alternator at low speed.

The red harness wire usually would go to the + post on your starter. This is the + charge wire to the battery.

The orange wire may be the fused B+ lead to your dash/helm for gauges and key switch. For simplicity and a better connect, it should be tied to the same point the red wire is secured to. Two high current wires crimped like that is not reliable or efficient.

That short strap from B+ out, to the spade (tied to the orange wire) annoys the heck out of me. That is a poor rig from a previous wanna be tech.

Your warm alternator is from getting excited and doing nothing. Even draining your battery.
My first guesses are the purple wire is hot when key is off or the leads between the spade post are backwards.

How comfortable are you with a DVM?
Please confirm where the orange and red wires go.

Dead at the end; Not connected to anything?

This may be a external feedback strap. Usually not used on Delco's.

Perfect.

Strange. Lets still find if this purple wire goes + hot with either key switch on.

NO. Still need to know if the purple is keyed hot for this try to be preformed smartly.
The third male spade forward of the side by side spades may go to a indicator light. Lets try not to touch this lead with any hot leads.

Do you have Battery parallel relays?
Do you have combiner relays?
Do you have Battery Diode Isolaters?
How many battery banks do you have?
How do we know the other alternator is charging or wired correctly?