I wouldn’t advise looking at wiring diagrams you don’t understand just before you go to bed. But I’ve woken up understanding what you were trying to do.
Ignore my last post it’s completely wrong.
You through me off the scent a bit with the thermo fuse positive.
He’s using the switches as ground so where you show a positive in your drawing on thermo fuse should be ground/negative. He’s doing it completely opposite to me.
so using his drawing you screenshot, for the aux pump signals you’ll have to use pin 87 off of the 4 pin relays because of the constant ignition live you are using on the aux pump relay trigger, it’s the same but different.