As you can see in the image below of the KStars/Ekos Profile Editor, I see a driver for a Meade motor. Is this the system you're using? However if the motor isn't connected to it's native electronics, I don't think it will work.
I think it's easier for you to simply purchase a modern-day motor and attach it to the focuser. I use Gemini focus motors on my C5 SCT, and also one my 102mm refractor, which are available with a wireless remote and temperature sensor for $90 with shipping. It will need an additional mounting hardware kit for SCTs. There is a side-mounting adapter available from Buckeyestargazer as well, which I use on my C5. The Gemini motor is readily controllable from Ekos.
There is also a motor-only kit available from ZWO for $200. There is an INDI driver available for it. It will also need the ZWO SCT mounting bracket. Buckeyestargazer also has a side-mounting ZWO focus motor SCT mount.
Pegasus also has a motor that you can use on SCTs for $200, which has it's own SCT mount setup. It also has an INDI driver. You will need to specify what size SCT you have.
A word of caution if you decide to use any of these motors, I don't know how Meade attaches the primary mirror focus mechanism on the large scopes, but if it's the same as on the 6 inch ACF, the mirror focus knob is the only thing that holds the primary mirror mechanism in place, which, to me, is absurdly insane. When my friend and I went to attach a motor to his 6 inch ACF, the moment we removed the focusing knob, the entire primary assembly slid down the primary baffle tube and went crashing into the secondary mirror and corrector plate!
Needless to say, that was quite a disaster. So if you're going to install one of these motors that I've linked here, lay the scope on it's side when removing the focusing knob, or the same fate may await you if you stand the scope straight up, unless someone here can reassure otherwise that this won't happen on the larger Meades. 
Hope this information is useful for you.
