[craig tn]

Here's a few pics and drawings(they are not to scale).

The 8 volts are a little narrower than the 12v so this will give you more room to turn the 8 v the other direction. I built a sheet metal plate to hold the 2 center batteries from moving back and forth since there rear battery hangs over a little and tries to slide back with a hold down between them.

If you use the 12 v hold downs you may have to flip the batteries around so that the post are not in the way.

I think I had about a inch of clearance between the battery post and bottom of seat.

Hope this explains it better.