The stalks are the things that stick out on each side behind the steering wheel....
normally the left stalk controls the direction indicators and the lights (side, dip/main lights),
and on the right stalk it controls the windscreen wipers (front and back).
Perhaps either one or both of your stalks have 'extra' functions.
My car has headlight washers, and they work (when the wipers are on) by pressing the button 'in'
on the end of the left stalk. ForFours that do not have headlight washers do not have that button.
So...as I have said...maybe your right stalk has some extra functions....
Perhaps if you took a close up picture of both stalks then we could maybe see if there are any differences.
And if you do that...why not take a picture of the steering controls too.....every little helps...so they say.