Coolant temperature sensor position - fan operation

Simple question but I am doubting myself. Where to position the coolant temperature sensor to operate the radiator cooling fans in our mid engined cars with the radiator at the front of the car?

I plan to put the temperature gauge sensor for the dashboard gauge in the swirl pot where the water exits the engine, do I put the fan temperature sensor at the same place, or in the outlet pipe from the radiator? The latter was my initial though.