In these pictures, the mast of the jack is upside down. Bring the ratchet and the hook down to the bottom of the mast, install the jack handle as I've described earlier with the lug nut end in the retainer, the spring on the jack itself and the other end of the jack into that strap on the floor. Tuck the base of the mast into the retaining bracket against the lug nut end of the wrench, hook the other end of the little spring through the hole in the hook and then cycle the ratchet up to tension the spring. Doing it this way only requires you having the jack base nested in the spare tire and will leave you plenty of threads for both wing nuts and the cover plate for the masonite.