I've got the same adapter setup, only mine is the goofy older one that was originally used on a B van, that you had to use a manual coupler with. That was before Mancini made their version, with the power coupler spline setup. That stuff was alot more difficult to find before the internet! As a result of getting that, I bought a few nos manual couplers for spares, figuring nobody would reproduce them. The box is a good used one that I think I got at the Nats about a million years ago.