the drain holes in the roof ie the two at the top of the a pillars and the two at the top of the c pillars, do these have hosing from the holes themselves all the way down or does any water drain in and down the cavity until it at the bottom then is drained via a rubber hose ????. the reason i ask is on my last rs turbo i had a repair on one of the a pillars and when i looked inside there was just a cavity.

dave.