To power my MP 6 Ii, I created my own by adding a a Hirose connector on a spare 4AA sled and mounted a high efficiancy Traco DC/DC converter TSR3-24150 inside to feed the internal connectors.
Unfortunately a lot of my audio equipment is down in basement storage so I can't find any photo of it.
I would guess that's what you would find if one took a peek under SD's own Hirose sled.