Not sure what you mean?
"starter solenoid" was the popular name for the starter relay that was mounted on the inner fender in older vehicles
And if the starter motor did not have a built in relay then the "starter solenoid" was used to pass battery power to the starter thru the larger cables, one on each larger post.
And Battery post on starter solenoid was also used as Power distribution post, for fuses and alternator hook up
Battery------------Starter solenoid-------------starter motor
red/blue activation wire runs to starter solenoid, "S" post
If using a starter motor with built-in relay, later models, then starter solenoid is not used to activate starter motor.
Battery----------\starter solenoid
..........................\--------------------------------starter motor
So battery and starter are connected directly, share the same post
The Red/blue activation wire runs to starter motor's "S" post
Picture of starter motor with built-in relay:
https://static.cargurus.com/images/site/2014/02/08/21/32/pic-4644068173647346939-1600x1200.jpeg
You can see the larger post for battery cable and then smaller post for activation wire, red/blue wire
Now there are some drawings floating around that can be a bit confusing for this change over to starter motors with built-in relays
You still use the starter solenoid to activate starter motor, BUT..........you hook up the larger starter motor cable to Battery post
THEN run a smaller wire, Red/blue wire size, from the now open larger post on the starter solenoid to the smaller post on the starter motor with built-in relay
It is a Double relay setup so I find it a bit backwards
"I" post on the starter solenoid would run to the Coils "+" post, it gave coil full battery voltage when starting the engine, stronger spark for cold starts
This was no longer needed with most electronic ignitions.
It was used with systems that had a Ballast resistor or a Resistor wire that lowered coil voltage when engine was running.
If running a 4.0l then EDIS module runs the spark and wouldn't need "I" hook up
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