1965 Dodge Dart Charger

65 and 66 might be different but here's what my 66 looks like. The spring attaches to the body of the jack in a slot just below where the hook attaches. The lug wrench slips through round end of the spring and the ratcheting action of the jack puts tension on the jack mast and the lug wrench. My hook and base slips over the hold down rod that comes up through the spare tire. tmm

That's IT !!!!!!!!! Ulf has the open ended spring instead of the full loop style. The short hook on the '65 spring goes under the jack handle, and the long fingered hook goes to the ratchet.