@Belfoured Sorry for the delay in responding to you. I tried to determine just how the unlimbering and limbering process was carried out for many years. I remember checking into Gibbon's book and being disappointed in that regard.
I had assumed it would be at least similar to what was done in the Napolonic wars. That was difficult to find out about too. This video was pointed out to me recently and seems to be the answer, at least resembling what was done here.
I find it strange that something so basic that must have required lots of drilling to accomplish was not written about more.