That's exactly what I think because the cam plate takes four bolts and I have three and one missing? I installed the cam today and can't find but three matching cam plate bolts. That's were I'm trying to install the cam plate. But the other bolts don't have a hole through them and I don't remember ever noticing the hole in that one bolt. I might have misplaced the other matching cam plate bolt but I don't see how because I kept everything together.