Inkbird 306a temp probe question

[Auphoenix43]

I have a Red Sea AIO 65 gallon tank. Where should I put the temp probes for the controller? I have the heater and back up heater in the middle of the back sump space. I’m not sure where to put the probes to get the temp stable for the whole tank.
Thanks

 

[JGT]

Key is you want them together wherever you put them, a couple of inches apart. Where really isn’t that important.