I'm in same boat........
So what, if anything, goes to the other stud?
Your large positive cable goes to the top stud on the starter solenoid, the small spade plug on the solenoid gets the wire from the starter relay.
The starter relay wire tells the solenoid on the starter to engage and it then feed voltage from the top stud to the bottom stud which engages the starter.
Sorry to be a pain, in the pic above, there are 2 studs and a spade.
I get that main BATT lead goes on 1 stud, and the start relay goes to the spade.
What about the other stud?
The lower stud already has a wire connected to it, coming from inside the solenoid.
That's why when the small female tab gets powered from the starter relay it engages the solenoid and the positive cable powered top stud send power through the solenoid and engages the starter.
Make sense?
Like they say, they are no dumb questions.
It's how you learn how stuff works.
