Have you tired taking the backs off and just checking if the adjuster isn't just popped out? I would do this first and also find out what you need 100% instead of just guessing. It could end up you need a housing not parts.
I need the black plastic piece that has a thread on it. The piece that is connected to the top part of the Cell that has the Xenon and the High beam on it. I've taken lights apart b4 but got a little aggressive this time. so one of the two adjusters doesn't connect to cell spoken about earlier.