'69 merc single wire kill switch question??!!

[jbjennings]

Guys, I've got a '69 merc 9.8 that has all the kill switch wires taken off of it. I have a junk 7.5 merc that I can rob the switch off of, but I have no idea how a single wire kill switch works because it's disconnected on the 9.8 also. The only thing I can think of is that when you press the switch, it grounds something to the belly pan. I have had some good help on another forum but can't "seal the deal" because I don't understand fully what's going on. I can send pics if needed, but I know some of you mercury guys can probably solve this with your eyes closed.
Lastly, could I just use a hardware store push button switch and wire it up so that pushing the button shorts across the points? I see a location near each point that I could hook a wire up to. Would that possibly be the better solution since the darn old 7.5 switch could be bad, too?
Thanks,
JBJennings

[Laddies]

All pre CD twins are killed by the switch shorting the points together. There should be 2 wires coming out from underneath the stator that go to a small plastic block on thee side of the engine, just run 2 wires from them to a 2 wire switch

[jbjennings]

Thanks Laddies,
I'll give it a try tomorrow and report results. I'm sure glad to see you're still posting!
Later,
Jason