This is how I do it:
The bolt with washers simply goes thru the chain and thru the aft most tractor draw bar hole (washer & Loc Nut). Next. By the time the Hoe stabilizers are <45* the tractor tires should be clear of the ground or close to it. If not lower the stabilizers and select a shorter link in the chain to bolt to. Voila. One thing we can do that sub frame and permanent mount hoes can't is select the height of our hoe......... but, it is best (logical) to have the tractors 3PH lift arms in their lowest position, then lower the Hoes stabilizers. It'll take a time or 2 and it'll always be that same link so the testing out will take 5 minutes and then I mark that link. A heavy tractor (loaded tires) and weak hydro can struggle getting the tires light on their feet. It still works.
As always one must use their noggin. If it doesn't look safe (bad ground conditions, leaky cylinder, weak tractor drawbar, etc.) don't do it! YMMV!