Are all instructions for computer parts as vague as mine?

I'll admit to being a severe novice to this but I have done a build before. First I was surprised to see that the motherboard instructions didn't even tell you to install the brass risers. Good thing I remembered this. If I wasn't one step from a complete first timer I would have fried my board. Not one bit of instruction on what to plug into what. Some plugs are obvious and others I've had to use the process of elimination. Why not tell them which connection goes into the Com 1 header? That is all for my amateur bitching.