With some time on my hands I’ve started looking at vMix again and have a question ( or two)

I have an ultrasound 4K and had hoped that with it’s A & B inputs and outputs that I could feed different images such as a still, a Vcall or a VT out. One via A and the other via B, have I got the vMix setup right or is the Ultrastudio 4K only capable of outputting the same thing over both SDI outputs ( which is what it’s giving me)

Scaling that up is it possible to output 8 different Stills, VT’s or Vcalls from a computer with the Pro software and Decklink Quad 2, different image/feed down each SDI basically.

Any help welcome