Primary Keyboard?

Hey guys,

I hope I am right here in this forum and you can help me maybe.
I have a Razer Blade 2019 27" and usually use it on a docking station with external periphery (like mouse and keyboard).
Now I just bought a BlackWidow V3 and have some problems with the Chroma Lighting settings via Synapse.
All the Settings I try to setup with the external Keyboard via Synapse just changes the settings for the internal notebook keyboard. For examble the Chroma Setup "RAZER" under "extended effects" (wich I always loved best, this is the setting that reacts to certain keys and effects in some games, right?) doesnt even work, the BlackWidow stays completely dark and the notebook keyboard lightens up like a christmas tree.
Is there a way to change what keyboard is primary or how to explicitly change the settings for the BlackWidow? Or am I just doing something wrong?

Hope you guys can help, thanks in advance, I'd be really glad!