Read any faq or watch any video on youtube about cloning... I don't know anybody that would try to root a clone that big, or root in coco. Most clones are lucky to have 3 leaves on them, and most often those 3 leaves are cut in half, and then they're stuck in clonex which works ok, hell water works ok, then in rockwool, then under very low light for the first 4 days under a humidity dome misting often and fanning in fresh air or with wilt spray, then med low light for up to 2 weeks if you really suck at it. If you have left them alone those last weeks without the dome and no misting and they look healthy by that time then they'll have made it.
Cubes should be kept consistently just barely moist and NEVER NEVER WET.
Leaves wet while using the dome.
Or build a basic aerocloner, nothing is easier or faster than cloning in aero. bubblecloners aren't nearly as good or fast as aero but are a million times easier than what you are trying to do which I think is just about impossible if not completely impossible.
Nice plant though...