No spark no start
 

I have a 1991 mazda Miata 1.6l and I have no spark, previous owner told me there was an inertia switch you had to flip since the car was Lifted up more than 30 degrees but I can't find it anywhere I looked where he told me but nothing.
I have the original cas and I grabbed one from a local junk yard and still nothing. What should I look into next?