I bought a rail kit for my Accentra insert (original not 52i) and something seems off about the hardware that came with it. The first issue is that the plate on the underside of each rail has a threaded hole (see photo) but none of the hardware that came in the kit mates with those threaded holes. The picture on the website where I bought it shows a pair of short bolts with the winged heads but the ones in the kit are about 4 times as long. Can someone who has this kit confirm what their hardware looks like?