It has to have one. My 601's stop lever is deep in there below the intake manifold. I can barely reach it with my bare fingers, using a screw driver or such would make it much easier. The picture in the owners manual shows a stop lever from a 617 that clearly says STOP on it. The actual lever on the car is just a black one with no STOP printed on it. It was 2 years after I got the car that I found the damn thing and tried it out... IT WORKS!
So maybe this 2.5 NA is the same way?