Im sorry for causing confusion. Im not going to wire the quickie any different than what the instructions say. I was just comparing the pictures of everyone else's quickie to mine and noticed by following the instructions my quickie has both batteries going the same way and not back to back. Everyone has their battery packs with the negative terminals back to back.
How did you guys do this?
Did you thread the wires through the opposite holes in the battery pack?
This image shows the correct way to do it. Both battery holders are prepped identically, one is rotated 180 degrees from the other. So yes, the black leads must be back to back if the instructions are followed. (There is a picture of the top plate with some white writing on it, and that is a little erroneous)

In the instructions, there is an image right above and to the right of this one. It shows an unprepped battery holder next to one with the lads rerun.
-Paul