Problem with bolt connectors

Hi I have a very complicated assembly which I am trying to get the stress analysis done. In the assembly there are some parts that were ment to be bolted, but the guy who did the drawing didn't put any holes in there. So, I can't define bolt connectors there. So, I was thinking what component contact condition should I impose between those parts to get the similar load effect. i.e. I don't have enough time to redraw. Is no penetration a good enough or should I go for bonded?