You gentlemen are discussing what is at the binnacle, which is basically meaningless for the purpose of this discussion.
What you need to do is, as some have mentioned, look at the website i linked and look at your engine.
Separate throttle and transmission cables AT the engine? Check. (Doesn't matter what's "upstairs" - knobs, levers, upside down or backwards, skyhooks, simply doesn't matter, they're there, right?)
Separate kill cable at engine? If NOT, then the ONLY way to stop the engine is to cut off the fuel.
As noted, some use solenoids, but I've rarely seen them on Universals.
My M25 has a separate kill cable which goes to the fuel cutoff inside the engine just under the throttle lever.
If you don't have the separate kill cable, then either it's missing or there isn't one on your engine.
THAT'S the "detective" work you have to do.
PS - Look here: http://www.marinedieseldirect.com/ca...ors=&comment1=
Last line, Ref 99, Stop Cable, Optional Add On Equipment.
Could that be a "clue?"