Water leak/removing rear seats

[dogsridewith]

2007 hatchback rear seat bottom comes up easily when you squeeze release tabs on two large white clips you'll see looking under...w/ front seats pushed forward, agility, mechanics mirror, patience and determination. (I may have used a waterpump plier to squeeze the tabs...or an adjustable wrench set w/ just the right opening.)
On water leaks, confirm the little black drain tube exiting the lower firewall is not obstructed.