Re: Water Leak from clogged sunroof drain(s)
The rear drain channels are located in the rear most corners of the pano-sunroof. If you would like, you can actually see these drain channel openings by taking a flash light (small/bright is best) and look toward the back of the vehicle from the front seats.
Because I've cleared the drain channels a hand full of times, what I do is take my air compressor with a blower device and attach a long hose on it and snake it back to the rear drain channels and blow them out. A diagram is not really needed, you can see these drain channels if you look very carefully.
93 Corvette, with lightly modded LT4/ZF6. Polo green, Beige interior - garage queen.
11 Overland V8/4x4 Mineral Grey/Lt. beige/730N
Dad's car; A restoration I took over: 79 Porsche 911SC, now running clean!! (read about it here