Sounds like you may have the original WD drawbar and spring, not a snap coupler. Should be a big pintle hook looking coupler that the drawbar snaps into. When you pull the release handle the jaw will open and you can drive off (assuming you unhooked the arms! or, in the case of the drawbar, the brackets that adjust the height.) You can also have some one stand there and, when you open the hook they can manually pull the drawbar free. I pull the height setting pins, let the dawbar down on the ground then open the jaw and drive away from it. If you are then attaching a snap coupler implement you need simply to back into its drawbar, insure the drawbar of the implement is aligned to slide into the bell shaped housing where the coupler is.When you hear it snap, hook up the lift arms, raise the implement and go.