In the CCKW manual they suggest using a fixed object to winch the vehicle too so as to place some load on the cable as its being wound back on the winch drum , there is also a split block that can be fabed that would mount on a vertical 2x4 which has a single bolt through a second 2x4 which runs upward at an angle from ground across the bumper to provide a drag load and guide that a person moves to feed the cable back on to the winch drum in even layers , these methods require two people to do as the WWII American winches did not incorperate a cable laying on system , I think those came along on the Vietnam era and newer vehicles.