Elwell sent me a temperature probe and harness; just installed it

Amazonica

Got mine installed. Thank you all for the help to secure it. The most time consuming part for me was removing the existing two wires from the white plug. For anyone else who like me, is not 'handy', I used a tweezer to coax them out of their spots and not break off the tiny clips.

Definitely gives a more accurate cabin temp reading.