I'm not sure on the 36 but I've got a 38 and the battery box on it was originaly located under the pasenger side floor board.
I had ours there but my wife had a fit every time we would bump something on the road and it would bounce up against her feet, the car sits kinda low.
Anyway I moved ours to the fenderwell behind the front tire with a frame and battery box home fabed and it works great. I had considred moveing it to the trunk but didn't want to give up the pace as we travel a lot and need the trunk space.
Unless you are an originality type person I would put the battey wherever it best suited me and rout the cable as such, just be shure to use rubber gromets when going through the sheet metal.