Formula in assembly mode

Hello,
I have a question if I have a number of holes in a piece and I want to have a direct connection between the plate with holes and, for example, screws, a formula in the anssemly module.
If I have 6 holes to have 6 screws but if I add another hole automatically to appear a screw in the center of the new hole created.
I'd like to know if I can create a formula between two Parts.