where i think my green cts should be in the plastic housing on the top rad hose i have a white one with a square two pin plug? instead of the half circle square plug on my new sender? further along i have a blue square four pin plug/sender? do i need a different sender im guessing so? well i may not need one if the thermostat i fitted today sorts my temp fluctuation, thats a pig of a job with the alternator there lol, to think i read a post on here saying it was easy!