Quote Originally Posted by Spudman
Snarph
I have a few guitars like that one.

Generally there is a dense foam rubber pad that lightly glues on to the back of the pickup. That keeps the pickup from moving in the cavity. The screws are small diameter wood screws.....
That's the way the pups were placed on my old Ibanez bass I forgot about that foam backing. They did screw directly into the body too.