I just finished a minor makeover to my stereo system consisting of the following:
Added third battery
Relocated subwoofer amp
Added power and ground distribution blocks
Added Stinger voltage display for stereo batteries
Added remote LED for ACR
Added in-dash aux input plug
Added iPhone4 mount at the helm
Added JL Audio 7.5V line driver with level control at helm for Exile Harpoon
So here is what it looked like before I got started. The Exile subwoofer amp was mounted to the fresh air chaise and the power and ground cables were connected directly to the stereo batt (it was a mid summer, quickie install); thermal circuit breakers were used on the power cables for the other two amps; negative cables went directly to the stereo battery.
http://i250.photobucket.com/albums/g.../IMG_07592.jpg
So I took the two batteries out and installed a group 29 125AH battery under the port bow seat as shown. I chose this location because I did not want to lose any space in the cubby under the glove box as that is always packed full of backpacks, lunch coolers, etc. I also added a ground distribution block with 1/0 cable to the battery and 4 gauge to the amps.
http://i250.photobucket.com/albums/g...y/IMG_2585.jpg
Only about half of the battery is visible.
http://i250.photobucket.com/albums/g.../IMG_25972.jpg
It clears the fiberglass lip by about 1/4".
http://i250.photobucket.com/albums/g...y/IMG_2600.jpg