This is a picture of the trunk mounted Optima battery.  The tray is custom built and fits the battery perfectly.  The cable(which is left long in ths picture) is 2/0 guage welding wire, large enough to carry power to a small city.  I would recomend these batterys to anyone.  They are completely sealed so there are no poisonous/corrosive gasses floating around in your car.  These gasses will make your car rust!!!  Also besides the sealed fact this battery has many other benifits to find out more visit:  Optima's website 
A small note:  the battery i bought is actually a champion vortex which is just a  optima but has champions name on it and is available at many local autoparts stores.