Cruise control my cup?

Seen a full fat steering wheel for sale I like with also the cruise control buttons, what I am wondering is there a wiring loom for this already behind the cup wheel or is there more to it?
 
I would imagine there's more to it because the cc switch isn't on the steering wheel it's down by the light levellers
 
My last 3 cars had CC and the only time I got to use it without having to slow down/brake was during the night when there was nobody else on the road.

I also found it to be less economical than using my right foot for some reason.
 
I don't use it any more
Seemed to be getting worse miles with it

The cruise control button is down by the levellers and esp button so I would imagine the loom isn't all in the steering wheel