Battery Cut Off Question

I was doing some reading here last night and have a question. The battery is in the trunk so I need a cut off switch to race. I just mounted the switch, ran one wire from the "off" side to the positive post on the battery. Then hooked the existing battery cable and heavy wire that runs to the starter relay, to the positive side of the switch..

I tested it by turning it off and the car won't start, so I'm thinking it's good? Now I read that I have to take the positive wire off the alternator and run it to the switch, or the switch won't shut down the car ?

Anyone help me out here ? Also, can I just go out and fire up the car and shut off the remote switch, w/o doing any harm ??

Thanks,

Kenny
Author: admin