You could have solved it. It would be a neat trick to lift a bus by simply bolting this gizmo to the drive hub, and the gizmo would give a good clearance between crane and side of bus. I could imagine it might have been not uncommon for buses to lose their wheels, and this would be a quick way to get the axle off the ground and some packing underneath.
Edit: After a coffee and a think :coffee:, I'm not so sure. The gizmo holes look right for 10 stud wheels, not the drive shaft flange of a hub, so it would not be easy to get onto an axle with collapsed wheels. Pulling a bus sideways maybe??