Joao, welcome to the forum. Cube makes some very nice bikes. I have ridden a bike like yours and was very impressed. It is attractive, quick and nimble. It has a very capable and athletic ride.
In the USA all the Cube Reaction Hybrids I have seen have the Purion display/controller. You were asking about putting a Nyon on your bike. The Nyon mounts on to the Intuvia center handlebar mount but needs one of those wired into the motor in order to function. Did your Cube come with the Intuvia dsplay?