I have also been watching this thread for a few days now and waiting for some time to have a go at removing the panels and looking for the White connector & sensor switches.
Well today I can only tell you all to just have a go. I decided to order the parts as per the numbers provided in this thread and for your info again they are:
Cruise Control Stalk: 156047955 = £55.32
Steering Column Cowl: 156034454 = £9.18
I did this on a whim and without checking my car was compatible, numpty I know
but I do this sort of thing once in a while.
However when I got home at 17:30 in the cold and dark I decided to have a look and see if my Whim was justified. As I used a little torch I removed the 3 self tapers that hold the lower cowl on and then removed the panel. And low and behold the WHITE Plug was staring me in the face, right in front of my eyes.
I did not even have to untuck it from the dash. Whilst I had this cover of I shone the torch through the dash under the steering column and I could see that each pedal had the required coloured sensor attached, it took me less then10 mins in total to remove, observe and re-fit.
So Friday my parts will arrive at the dealers and by first light Saturday morning I will have it fitted and tested. I will update you on its progress if you wish and if you would like some picture let me know before Friday and I will take then as I fit the unit.
Also on the picture above, my white plug looks just like to one you have pictured but yours is connected to someting