Its on a lead, drilled small hole in corner of lower section, with grommet (tiny fiddly ^&%#W thing) and it sits suspended into lower section
Just above pie height
Its measuring air temp near centre seal I guess
Had to make sure the wiring inc sensor wire was on outside of insulation
For anything your heating up, make sure its over 60 deg or you could get crook.
The thermostat and oven has hysteresis issue, setpoint at 65 sees temps range between 60 and 75.