Ok I got a used exedy twin disc for my lsvtec hydro trans. about to put it on. On the two disc Are identical, on both disc there is one side that's flat and the other with a hump on it. I have no idea if the flat side of the Clutch disc should be facing the flywheel side or pressure plate side. Please give me input i already dropped the tranny just need to find out asap. I want to get it done tonight. Thanks