The top half of a lightweight tubular aluminum chair has been fastened the the rear section of the chassis using several pieces of aluminum C-channel and secured tightly so it doesn't snap off and send someone flying. The chair is mounted very close to the chassis so that it keeps the center of gravity as low as possible for tipping reasons.
The dual battery setup was placed in the very center of the chassis, held in place by three L-brackets, one on each side and one behind the batteries that holds it tight against the chassis' crossbar. A cover was mounted over the battery with foam insulation to help protect the leads from getting damaged or somehow connected if something fell on them.
The positive lead of the batteries were connected to the 120A circuit breaker via a short piece of 6 gauge wire with the appropriate connectors crimped to each end.
We decided to create a small display panel that mounts to the front end of the chassis. It will contain an on/off toggle switch connected to the 9V battery running to the Arduino barrel connector so we don't have to remember to unplug it. We also utilized the small LCD screen that came in the Arduino starter kit; this will be used to display the instantaneous voltage of the 12V batteries. Along with the LCD screen we have 9 small LED's mounted across the top of the panel which will all be on at full battery life and at 10% increments shut off as the battery loses voltage.
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