On the M20 the brown temp sensor is for the gauge you can replace it with one suitable for the racetech. The blue one is for the ECU. I would expect there to be something similar on the a later engine.
Sensor is the brass coloured one:
Again on the M20 there is a oil pressure switch on the exhaust side. I used various parts from
http://www.europaspares.com/ to put a T piece in moving the standard switch down and the sensor for the instrument on the side.
Parts (didn't use the middle one):
Pressure sensor:
You can see approx where it is located here:
I would guess you might be able to use different combinations of adapters to get a temp reading for oil as well.