Ok, here what I was able to find out, don't pretend to be 100 % true:
First column:
- autopilot disconnect (autopilot switch off)
- 4-way master modes (A/A, A/G, NAV) switch
- display's cursor steering
- super maneuverability switch
- trigger, I understand it's used for everything except gun
- don't know exactly, looks like it resets something (like TMS down in F-16)
- temporary disconnect of autopilot
Second column:
- forcing aircraft to horizontal straight and level flight
- don't know
- gun pickle (yes, it's strange position for it)
- don't know, but looks like it points to trigger
- management of EO station
- comms switch
- consent for something (?)
- speed brake
- introduction (direct translation from Russian)
- chaff/flare
Third column:
- weapons selection
BTW, there was information that it's an old configuration of HOTAS.