Bullocks there mate! How do I know? I'm glad you asked....just last week I fitted the stalk and it works....simple plug and play!
There is a verrry long thread all about this. There are on page 21 ( I think ) some very useful photos.
In summation all you need is the stalk and the lower cowl.
Take off the existing lower cowl...which exposes the white connector. Then just clip in the plug from the stalk, snap the stalk into position, screw it in with 2 screws, clip on and screw on the new lower cowl. Then start the car,
then turn the engine off again - restart and the ECU will recognise the cruise control...you be greeted with a little green light in the middle display between the speed and tacho.
Mine is the same year and model as your car.
I posted on Partsgateway and someone got back to me within the day and sold me both stalk and cowl for a very good price.
That's all there is to it.....I now use it to get to the end of my road