Thanks Canuk!There is a hole in the bumper on the right side of the plate. You stick the extensions together that should hopefully be in the truck with the jack. Look underneath the truck and there is a metal "tube" that stops short of the bumper but goes over the top of the spare. It runs at an angle.
Look through the hole and there is a female end of that tube, stick the extensions in there and turn counter clockwise.
Don't be surprised if it's seized up if you're in a rusty area.