How do you remove a Jayco concertina door?

We recently purchased a 2012 model Jayco Starcraft 22.68-1 caravan and have decided to replace the concertina door to the en suite area with a sliding panel. The entry area to the en suite is very tight and the opened concertina door takes up a considerable amount of the opening because it doesn't retract into a recess.

I just can't find how the concertina door is attached to the frame - all the fasteners are well hidden. I don't want to find out after I've broken something that it was simply a matter of .... (whatever). Murphy's Law says it will all become obvious once you've forced it and hold the shattered remains of the door in your hands.

Anyone here had any experience removing one of these things and can offer some advice before I start busting it off?

Thanks.

Gavin