Of course. As others have stated, don't drill into the case. The tolerances are too tight. The risk of striking a component that renders the unit unusable is too high. The thread pitch likely will be insufficient to hold the screws for long, so if you insist on drilling the case, then I would drill from the backside, but counter sinking will probably be necessary. Alternately, you could try using a nut+bolt with the nut inside the case to prevent the plastic threads from stripping. Overall I think this is a very bad idea, so I wouldn't consider it. If you need to mount it, then get a case. But all of this is obvious and has mostly been covered.
