I bought a EoloMatic PTO air compressor on e-Bay. Got a manual from the manufacturer. It shows 2 chains associated with torque restraint during operation. I know this same type of restraint is used with water and hydraulic pumps, but how exactly does one hook up these chains. Seems like its for rotational as well as axial shaft restraint. I wrapped them around the drawbar to lock it but there is too much vertical play in it so it raps the unit. Do these go around a top or side links or is there another missing element in this hookup ? Thanks you for you attention. Happy Easter !