Hi guys, quick question about the exterior A-pillar, probably for you guys who have put UHF aerials on top of the car. I have run some cables up inside the A-pillar trim, and was just wondering how well it has to be sealed/pressed on. There are a couple of holes on the A-pillar which the trim plugs clip into, and it seems that there is a "second skin" of body under those plug holes.

If the plugs aren't tight, or if the trim is lifted off the body slightly where the cables run through, can water get inside the car? Or does it flow somewhere else outside of the body.

Any help would be appreciated
Cheers
Lucas