The reset is to your left as you look down on the batteries mounted on the wall of the battery support. It is very tight space between it and the side or end of battery.
If it is tripped, you will have to push the "flag" back into the switch. The button trips the switch.
Below is a link to a pic. See post #8
http://www.thorforums.com/forums/f8/...king-7917.html