Oleg, I have no personal experience, but from reading instruction manual (page 9) it seems that you need to use SynScan controller to connect it to the computer and in this case you can probably use NexStar driver. Maybe you can also use some kind of EQDIR device instead of SynScan, who knows. Do you have one? Peter
Yes, you confirmed what I said - there is probably nothing to develop. You can use SynScan and Celestron INDI driver, SynScan in direct mode and EQMod INDI driver or EQDIR (it is what you called special cable, something like
) and EQMod INDI driver.
SynScan and Celestron driver is the worst solution and EQDIR and EQMod the best and the same apply for your NEQ6