Any way to use Kontakt's "port B"?

It seems wasteful that once my Kontakt 4 instance is using up 16 MIDI channels, I have to open a new instance of Kontakt. Kontakt has multiple ports for incoming MIDI signals, but only “A” is usable it seems:

Is there some magical way to enable port B so I can keep loading instruments in this single instance of Kontakt, and have Cubase route into this port B?

Thanks in advance.

only in stand alone mode

Can we use B port now?* without standalone,

cubase pro 11 + Kontakt 6.5.1