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If you don't like the charge line hot all the time you can use a large diode or wire direct to the battery and put a solenoid that is activated by voltage after the kill switch so when you turn off kill switch it kills solenoid and with it wired to the battery there will be no charge voltage to keep it alive. The reason the disconnect is on the positive instead of negative side is some alt. will full field and fry things when you remove negative. You can do the same thing on the ground side to by putting the ground through a solenoid and activating it on the output side of the disconnect the same way as the charge line you just need to get a solenoid that has two wires so you can run the other side to the battery side ground or it will not turn back on. I used to do rv repair they do all kind of disconnects and charge diodes on them. I just realized that big cube put a diagram that shows it perfectly.



If you are really worried about it being hot you
can put a 100 amp fuse at each end of the alt output
lead... how many times have you EVER HEARD of that
line shorting out... every production car is hot..
I dont waste my time with all those added things
that can fail and leave you hanging