Move the front seats all the way forward. Push aft on the rear seat bottom and lift up.
There are two metal loops that point down on the bottom front, and they hook on plastic barbs. You need to push the seat bottom aft far enough to clear the barbs.
The barbs are part of plastic inserts that mount in the floor. Don't be surprised if the insert(s) comes up with the seat bottom.
HTH.
Doug
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