3Ltr V6 thermosata

Hi'
Can anyone tell me where the thermostat is on a 406 V6 engine. I've the sensor and both pipes from the radiator go to the same area but nothing stands out as an obivous thermostat housing.

Just incase anyone else needs to know. The lower pipe from the radiator goes to the thermostat housing and it's a fiddley job to say the least.