I've done this job more than 3 times. There is also a plastic bit in the middle that pops up and out with a screw under it. The plastic gear selector cable end (not completely round) needs to be lined-up in a certain position to disconnect or slide out of the interface assembly.
I've also had the front of cable plastic female ball fitting/adapter at the gearbox select arm ball disintegrate on a couple, so make sure they are lubed regularly, but you can get away with it not being there in some cases.
I've also had the front of cable plastic female ball fitting/adapter at the gearbox select arm ball disintegrate on a couple, so make sure they are lubed regularly, but you can get away with it not being there in some cases.