Quick Controls Issue with Xfer Serum

Hello,
Now I`m using Nektar LX61 Controller and have done intergration with Cubase 8.5.

But suffering a quick control Issue with Xfer Serum synth.

For example, The QC #7 is assigned to OSC A Unison default. And what I want to do is to change QC #7 assignment to Filter Cutoff.
I think it could be possible just simply changing the QC #7 parameter in the inspector window`s
It is only effective that using the remote control editor manually in the VST Intruments Panel (F11).
Is there anyone get a hint for this problem?
Thanks

I did not find the right solution from the internet.
References:
https://www.steinberg.net/forums/viewtopic.phpf=229&t=130090
Animated Explainer Video

I think this would be a Steinberg question, I don't see anything that would be specific to Serum here. You can find information about making Quick Control assignments on (pg. 648?) of the Cubase Operation Manual