That rings some bells with me now, I managed it but I can't remember how I did it, sorry. Don't be afraid to pull the jet up through the hole, it will pull through, that much I do remember.
If you mean the outside painted part, I've done this once before, I think you just manually pull out the "tube" and then it becomes quite obvious how the outside painted part fixes to the "tube" but I can't remember the detail. If I can work it out though.................