The tops are supposedly sealed, though the washers on the hinge bolts can work loose and allow leakage. The issue is usually either a lock leaking, sealing washers loose or the adjustment of the cams. The center and rear storages are totally sealed from the bottom on all pre 2011 models, the rod boxes are open to the front. When water is in the bilge it can travel through the drain and splash around each side into the rod boxes, though not the center and rears, seats too. There is a leak potential at the center seat pedestal on some models also. Any leakage in those must come from the top down on 2010 and earlier. Thus the brown paper in the storage and we suggest a dousing of liberal water, by the cans full all at once. Then when it drains off, open the storages and see where the leak is. BCB