What is the difference between the Stud #1 and Stud #2
locations in the fuse/relay block? Do they work independently
or is there some commonality between them.

Stud #1 Accessory Power/Trailer Wiring Feed..............takes a 40 amp fuse
Stud #2 Accessory Power/Trailer Wiring Brake Feed....takes a 30 amp fuse

I put the 30 amp fuse in Stud #2 when I had the Lance camper harness installed.
Now I just purchased an electric brake controller to install for our new
trailer and I will need to put the 40 amp fuse in Stud #1 to make it work.

What do each of them do?
Can one of our electrical guru's simplify this for us........I'm confused

Thanks