where to hook kill switch

[tclapsadle]

I have a 1955 johnson 10HP that had a tiller on it, but i put it on a wooster hellion and rigged cables to it . does anyone know where i can hook up a kill switch wire to it in case of an emergency? it will shut down when the throttle is pulled all the way back but i would like to add a lanyard switch just in case. I want to avoid pulling the flywheel if possible.

[racer]

Needs to go to the points to ground them out

[tclapsadle]

thanks racer ,I tried to run 2 wires,1 to ground and to kill switch and another jumping from 1 set of points then to the other then to kill switch,but I lost all spark the switch is a lanyard shutoff with either open or closed circuits but I hd no spark no matter how I hooked them up,should spark on open