I stopped by Tracey Road Equipment again to grab a video of that awesome looking Western Star 6900XD. I attempted to narrate while sounding like a knew what I was talking about with less than stellar results. After looking over the hook lift setup again it appears to be a Palfinger Palift, the 5th wheel element is designed to provide an extra point of contact for increased stability and load capacity. At least that is what I believe. From everything I’ve seen (very little) This particular setup doesn’t seem that prevalent outside of Europe.
BTW, I have since cleaned by camera lenses.