It's a little late but the black wire is ground, the blue wire is pos cell1 and the red wire is pos cell 2 in this case. I just made a bunch of y harnesses and people want dang hyperions and now I have to get familiar with those...
So the hyperion uses the + first cell on the first pin, ground on second pin, then positive for each other cell and the last one has to be used? Thats a sick way of doing things.