It is a bit tricky and I don't use mine winder very often. I have the instructions at home but I will attempt an explanation from memory.
I believe that it is best to do it after cocking the shutter. Obviously the manual winder handle must be removed first (a small metal release clip on the handle itself to remove it). Then the winder is set in place positioned counter clockwise from its final position. There are two connection points that must be alligned before turning it clockwise to its final position.