Phenom Prime Built-in heater installation

Hi, I recently received Phenom prime with built-in vat heater. Although I found and read the document about vat heater, it’s not described there regarding where I can put the controller itself. Can I just leave the controller outside or should I put it inside the printer somewhere? I’m curious where is the temp sensor located.

The temperature sensor is in the resin tank. You can see it when you replace the FEP membrane. Put the controller outside the device. In order to adjust the temperature

Please share your printing results with the heater. I have looked at that option and wondered if it makes a difference.