No, you didn't. Which could be why you couldn't stop the trap from killing Sayaka and Alex. That is the only part of the trap that doesn't seem to fit in, so perhaps it could be a 'control' of sorts. But...mmm, it would make more sense if that is how the trap turned on, not off. If that is what it is for at all.

[Don't mind him he's over-thinking things over here.]