This is how you do a stealth DVD-Rom drive with a push switch mod. I didn't want to add a rubber or a spacer in between the push button and the front bay cover of my HAF 932 to open and close the DVD-Rom tray. I decided to re-route the switch to the back of the drive, so that i can have another switch hidden or placed at the back of the case or even at the bottom of the front 200mm fan cover.

You can mount the switch anywhere you want, i haven't decide where i want to place mine yet. I believe the DVD-Rom with a push switch mod will give you a rough idea. Hope it works for you and do let me know the outcome. Thanks.