How do I remove overhead switch console

[wsw]

I have a 92 240SX with sunroof. If I park downhill when it is raining heavily, water leaks in somewhere, fills up the overhead switch console & then pours out from the switches. (No stains or dampnes on the roof upholstery.) My wife thinks its coming thru the sunroof seal (drains are clear). I think its coming from the windscreen. How do I remove the console unit to track down the leak?