I'll be dealing with a similar issue soon (but unfortunately don't have the option of an SRII!). My rig has a 2-pin lemo out on the sled (for which I have a d-tap adapter, if that helps) and is powered by 14.4v Anton Bauer batteries. Also, the camera's power is a 3-pin XLR input, not 4-pin.
Is there any way to 1) safely power the 12v 16BL from my 14.4v sled and 2) any way to adapt the 2-pin lemo (or d-tap) to the 3-pin XLR input?