Neil, they should come out dead easily. They are the same on the Willy as on the 172. You see the 2 catches per part of the bench? They just have a small kink at the end that is attached to the car. It might be more or less than 90 degrees where they come out, but they do just bull straight out! Ive done it on a 172 and a Willy now.
Thinking about it, it might be more than 90 degrees.....