Outside temperature senspor

[Filipdci]

Hi I have clio mk2 campus and I want to install outside temperature senzor
I have small onboard screen (middle of the dashbord) and there is not senzor in the mirror.
I want to install senzor in the mirror but where to connect wire and also there is not wires in mirror or doors for temperatur.
There should only be two wires to connect somewhere so where to connect them?