I am planning to install an arc fault breaker on a knob and tube wired circuit. I have installed the arc fault breakers on a sub panel that is wired with romex, which was easy to pair the same circuit hot and neutral together. Since I need to pair the hot and neutral together with the knob and tube, does anyone have any advice on how to identify the neutral that should be paired with the hot? It is all like spaghetti coming into the panel.