As far as I know, even though they added support for 3 receivers, the recommendations for connecting an Assist with a secondary 2.4Ghz receiver to a CB200 hasn't changed and the secondary should be connected through the Primary (Assist) receiver, not directly to the CB200. The way you have things drawn there will be no stabilization when ever the secondary 2.4Ghz receiver is used. If the secondary is connected via the Primary (Assist), even if it switches to and uses the secondary receiver, the Assist will provide a stabilized Ex Bus output to the CB200.