Hello all, this is my first post in this forum.

I recently purchased a stack of AG-1980Ps. I was inspecting the machines and noticed that they don't have Video Control C.B.A.'s as shown in the service manual. The mounting tabs and posts are there, but it doesn't look like anything was attached to them. The screw posts don't appear to have ever had screws in them. Did some of these machines have these cards while others didn't?