I run the alt pos to the back BUT I put a 100a
fuse at each end so if it shorts at ANY point it
will blow either or both fuses.. a standard car
is hot all the time.. and the rules say it has to
kill the engine
EDIT
I should say I run it on the batt side of the cut
off switch like a lot do.. just with the fuses in
line.. 15% greater than the alt will put out at max