Best place for ambient temperature probe

Wanted to do a little crowdsourcing before purchasing a wireless thermometer and fan temperature controller. When it comes it ambient temperature which would be the better of the two spots?

Also if anyone has any advice regarding combustion inc GGG and fan controller and Thermoworks RFX that would also be appreciated! Leaning towards the combustion inc system for now because it’s truly wireless and would replace the old analog thermometer.