Gary, there's no DC connection on the power supply. There are simply two poles as I described. From what the elmer who made the power supply said, one connects the HT via the two cables to the two poles, obviously + to + and - to -. It certainly doesn't seem to be a commonly carried part, to say the least.
Like I said, I'm more curious about the process and how I'd do it than actually doing it. This Yaesu is my only HT right now worth caring about. Of course I could risk the UV5R-no worries if I burn that one out!