@jmorris
I see you swapped out the connector on the panelpole. I had to do that, too, for my setup. Getting the pin out (and then back in again!) was a pain. Bench vise to the rescue.
West Mountain Radio uses violet+black for 48v on their rigrunner.
https://www.westmountainradio.com/product_info.php?products_id=rr_4008hv_p48
I've seen orange+black or yellow+black for 24v/28v.