Electric fan, screw-in Temp probe?

I have an electric fan wiring kit with the Temp senser screw in type (3/8-18 NPT). Not the radiator fin type...Don't want that type..

Where does something like this screw into?

Where could I find a wiring scematic for another Toyota that uses this for their elect fan?

Thanks

 

haha... i've been working on the same thing. my electric fan operates off the factory sending unit right now but dosnt work quite right. been trying to track down the factory sensor to see if i could put a t in and add the aftermarket sending unit as well. so far havnt gotten a good look at the sensor to see if it will work.........