Wiring help for trunk mount battery

He has a photo and diagram here:
questions about battery disconnect wiring

As far as alternator output wire, not sure what you're asking, but basically it supplies everything once the engine is running.,
If the MSD 7 is like the 6, it sounds like you're talking about the wire for the internal relay. That wire is your on/off switch. Connect it to power and a small current turns on a continuous duty relay inside the MSD.
Concerning the alternator output wire, I'm running a one wire alternator in my drag car. There is no factory wiring at all, meaning there is no alternator 'field wire' as shown in the diagrams. What I had done previously was to run the alternator output, via a number 6 wire, directly to the battery side of the kill switch. The problem with this setup is that even with the kill switch pulled, this wire is still hot. My question is given that I have no factory wiring, where on this diagram would my alternator output wire connector in order for the kill switch to function properly, and by properly meaning that ALL power is cut off when the kill switch is pulled.