Again thx DevBiker for the Help.
I managed to build the Adaptercable, turned out very well. Unfortunately if you Sync the Strimer Plus with an external ARGB Signal it will only emulate 27 LEDs no mather what you tell the Software how much there are. It seems the Controller from the Strimer takes only one LEDstrip and copy the effect on the others. One LEDstrip from the 8Pin Strimer has 27 LEDs
First i tried with the Lighting Node Core and set it as 6 QL Fans. Only 27LEDs from the First Fans are showed.
Second i build an Adapter for 3pin ARGB to 3pin Corsair and Put it in the Commander Pro. Same Result no Matter what Devices i choose on this Channel it will only use 27 LEDs.
In conclusion it's nice to have the Option to Sync it to iCue, but you have to pay the cost only be able to use simple effects on the Stimer Plus. At the end i went back using the Stimer's controller for full effect. But the adapter was worth it anyway, now i Put my Velocity block to iCue :)
Hope that my experience help someone with the same idea. Maybe someone have a other hind too, to make this maybe happen.
Greetings