Battery in trunk/ fastback?

Mine was back there (right side) before I moved it back to the stock location.

I would find another place for the jack before I would put it on the left side (I wouldn't put it on the left side).

Once you get the battery box (required, I believe, if you ever track the car) you probably won't be able to fold down the divider. I know I couldn't, as it would hit the top of the box.