OK I tried changing MISO to B3.
Same reaction on Pro Micro. Light on board comes on then fades. No reaction in MMJoy2 nor in Device Manager.

I then tried connection without any CS connection pins - just:
VCC
GND
MISO- B3
SCK- B1
GEN- B6.
Same reaction.

So then I tried moving all CS connections in line with Czary post
CS Rudder- D7
CS Right Ru.-E6
CS Left Ru.-C6

and same reaction.

As soon as I remove senors plug the board lights up and appears in MMJoy2 software.