No, that's the right one...

For the JHH A-7, I split the second duct section (the one right aft of the fan) down the middle (along the longitudinal axis) so that I could roll it tight and get it to slip inside the aft section. Then you slide if forward and screw it to the fan. There is a poly-ply "lip" that you then screw in to seal the split and make the duct rigid. Something like that should work for the Rafale...

Bob