[*]Remove the insulation of the wire from both ends and bent the wire to to equal halfs.
[*]Insert both exposed ends of the wire into the gap created by removing the dummy switch and try shorting the two solder points by gently shaking the wire. Be patient and at some point, you will short the terminals, and voila! you will see the DTE. Do it again and again to toggle between outside temperature, average trip time and average trip speed.