2004 Subaru Outback seepage


I have water seeping out of the rocker panel trim pieces beneath the left side doors on my 04 Outback. The car has not been driven in water/rain for several days which leads me to believe that there is a drain pluged somewhere. Anyone know where the drains are located and how to remove the trim pieces. I got under the car and saw that there are circular tabs on the bottom of the trim pieces that may be covering screws, but it is not obvious how to remove tabs. Thanks in advance.