I have a 12 pin to the 3/6 cable but I only have one with my dice unit. I am not even sure if it is wired correctly as when I plug it in, I only get one side of the stereo but it does work other than that. Not sure where the fault lies as the CD player plays both channels. My dice may have an issue. The reference numbers are looking at the back side of the plug as it goes into the Dice.Well, Dont throw away the black one for the dice. Its not quite right but I may come back begging in the future. The end for the 6 pin/3 pin is correct but at the device side mine is a 12 pin connector, not what you show.
Worst case I may get in touch for that one and try to get a pin-out to modify.
I am very thankful that you took the time to look, I hope I can return the favor someday.