Example embodiments relate generally to an apparatus operable to couple a pair of implantation rods that are surgically implanted adjacent to a plurality of vertebrae. Furthermore, a recording apparatus for recording on the sheet material by the recording head is also disclosed herein. A tailgate release-latch unit disables the actuation of the flap actuation handle upon detection of the disengaged condition of the horizontal hinge latch mechanism by the first disengagement detection unit, and swing actuation handle upon detection of the disengaged condition of the vertical hinge latch mechanism by the second disengagement detection unit.