Cooling fan wiring.

[Enoch]

I am confused. Again. In my haynes sierra manual it shows a thermostatic switch that gets fed from a relay that drives the fan. What I can't work out is where the switch is. It looks from the manual to be a dual switch, each switch element switches a single fan. I would only need one as my car will only have a single fan. Anyone got any guidance on this? I assume the two switches close at different temperatures?
I am concentrating on my cooling system now, I am waiting for a propshaft but want to get the cooling system fully done before it goes out for it's first drive.
Best and all that,
Enoch