Question about the integration of roof windows with Somfy?

Hello community,

I have two Roto "R 89 G" roof windows.

My regular windows are equipped with "Somfy RS 100". My window installer says that I need to have an intermediate piece (actuator?) installed by the electrician. I also want to be able to control these with the "Somfy Tahoma".

But he is not exactly sure either. What could he mean by that exactly, so I can tell my electrician?

Best regards
DenglMan

Believe me, with this meager information you will not get any help. What is the Roto R89G supposed to be able to do? Shade, open and close? What requirements has the window manufacturer actually created?