Push the bottom edge of the seat back on each side towards the back of the car and up to clear the hooks then it pulls out and the nuts that hold the top down are visible.
On some I find it's easier to use a large screwdriver to sort of pry at the seat bottom for extra leverage.
Thanks. I want to run a heavy wire to install a power outlet in the trunk, easy with the seat out.
Actually I noticed a green wire with permanent battery live near the left (looking forward from the rear bumper) trunk hinge, but I don't think it will cope with a 12v coolbox demand.