Alright sundown, we get it, you don't like idea. Back off.

First is a straight starter kill, second is a starter kill with a bypass option. Ask if you have questions. Simple use of bosch relays.

Not sure why I didn't think of it when I made those diagrams but the second option could be simplified with one relay. In the first diagram, add a second wire with a switch to either 85 going to 12V+ or to 86 going to ground, depending on the polarity of your trigger source(positive trigger add a wire to 85, negative then 86). If you do it this way be sure to isolate the 2 wires at 86 or 85 with diodes.(sorry, but don't feel like making another diagram)