Had exact same problem, there is a tube under the carpet with a connection in the rear cargo area the disconnects. Easy to fix, just allot of time because have to remove allot of the plastic molding on the inside. Then reconnect the tube, and prop the carpet up with a board to dry to about a day. Just take your time with the molding so you don't crack any and should go fairly easy.
the tube is right about in the middle of the bottom of the sub.