battery cut off switch

hi bluefish
very easy. first you will need a 4 post switch
then battery positive cable to one of the large posts.
cable going to starter on the second large post.
a jumper wire roughly 10 gauge ( 3 inches long)from one small post to the large post of battery cable large post.
and lastly the second small post on the switch you run a wire from it to the battery post of your alternator. you will disconnect the current wire going to this post and tape it off.it is a hot wire and will not need it. i have founf that this will shut of the car when it is running. no juice at all. the only down fall on the hook up is your amp gauge will not work correctly. but since i run a volt gauge it didn't matter to me.
hope this helps
terry