sorry, this is a repost from John, the chair GUY....
5 or 6 pin DIN, maybe?
I totally forgot while I was there, but the umbilical between my phono stage and battery supply (that was there this weekend) may have fit your Mapletree straight up. I didn't think of it until I was well on my way home.
Revelation Audio Labs (Brad Vojtech) made a couple umbilicals for me in the past two years....they have absolutely been the most substantial wire changes I've ever bought. Far more benefit than anything derived from speaker cable, power cable or interconnect swaps - which tended to be subjective, rather than objective, changes for the most part.
You just tell Brad what you need, and he makes it custom for you. All silver wire, cryo'ed, air core...great stuff. A 0.5mtr is $169 for the Passge Cryo-Silver umbilical.
Dr. Lloyd, feel free to delete this link (or contact me to do so) if posting Revelation Audio Labs web address is offensive to you on your forum, but I don't think it interferes with your product line, and may even help to enhance it http://revelationaudiolabs.com/cables-power/index.htm