Most leaks in the trunks come from the tail lights. The rubber plugs should drain the water out, not in. Mine was leaking from my spoiler mounts (they were rusted out), my tail lights, and apparently somewhere else as I find water in there sometimes but can't figure out where it comes from. Maybe I should sleep in there one day and wait for it to rain :E hehe. Anyways, try those spots too, otherwise you may still get some leaks. The tail lights, you will need to silicone them as well as around them, the lights let some in too.