You mean these (this rather) f$%^%rs? You have to feel them out, no way you're going to be able to see them while the engine is in the car. Took this pic when we did my cam swap way back when. The hard part isn't finding the bolts either, the hard part is when you realize you only have the space to do 1/16 of a turn on the bolt at a time (on the back one anyway, this is a pic of the back one).