Adding a kill switch to a 1977, 25 hp Evinrude

Just picked this up a few weeks ago. It has a black pushbottom type switch on the front to kill the motor, but I don't see an emergency kill switch. Does BRP or some aftermarket companies make a kill switch that can be hooked up to this motor?

I assume I just need to tie into the wiring of the current shut off switch?

BRP part # 0379778 lists as a stop switch extension kit manual start model. It may be what you are looking for.