isolator and batts

This is what I have. 1/0 big 3 250 amp alt KINETIK KHC3800 Battery Stock 935 cc Battery Stinger 200 amp Isolator going to install this as the audio 4 kicker 12" l7s 2 2500.1 Kicker amps different batteries, don't want to harm my KHC3800, that's why I want the isolator. Not playing with...