Hi,
I’ve actually made a post about this. Basically in a Midi Track there is an option to Send Midi Data, but some strange reason this same option is not available in an Instrument Track!! 
Boggles my mind.
So Cubase needs to just move this functionality that they already have built into the Instrument Track and motorized faders will follow midi CC.
People have put in requests for it so lets hope it makes it into the Program at some point.