I have some original questions:
first about that wheels:



I suppose that four wheels (1 to 4)are used to get target manually, I don't now which one is for what exactly, but I know that they works like mouse dragging (left-right) in the tree indicators Up, (elevation, range, azimuth) and one of them still with unknown function for me!
and to lock automatic tracking we pull (or push) the desired wheels, in theory only two wheels can do this push/pull,..
my guess is right?

can you tell me more about that wheels?

1, elevation, you can rotate it left - right

2, range, you can rotate it left - right (this wheel is bigger, to be able to rotate it more precisely)

4, azimuth, you can rotate it left - right and also you can pull it out (approx 1cm) or push it in.
When it is pulled out towards you, than you are in control. (manual mode)
When it is pushed in (right click on the mouse), towards the instrument panel, than the system has control. (automatic angle tracking mode)

3, target acquisition mode selector
In the beginning, these systems (SA-2/SA-3) were shipped without target acquisition radars (P12/P15/P18).
So they can be used like an acquisition radar. This mode is not simulated with the Neva, but you have it in the Volhov. (not documented
This rotating wheel has 4 settings, off-KO-MSP-BSP. The indicator is above it.

After the Vietnam war, all SAM battery received own target acquisition radar, and these were forbidden to use. (also suicidal)