The thermoSTAT probe is what goes between the glass and the heat pad (on the outside). The thermometer probe goes directly above the heat pad inside of the tank, measuring the hottest temp your snake has access to.
Fair enough Eric. TY for correcting for the OP. I knew something I wrote seemed off but was exhausted and couldn't figure out what.
0.1 Lesser Pastel
1.0 Black Spooky Kitty 0.1 Faye Tiny Kitty
?.? Feral Cat Colony
And more on the way always....