Adapter for Anker B2933 to 6mm square peg

I bought a B2933 to charge my phone in my car to replace an older iOttie charger that mechanically grips the phone. The included vent mount was surprisingly stable, but because of the way the vent blade depth adjustment mechanism is designed and the layout of my car, the phone ends up being right behind the windshield wiper controls.

Based on an Amazon review photo where somebody was complaining that their charger was missing a piece and didn't work, I had determined that I would be able to reuse my existing ball joint mount from the previous charger. Unfortunately, after I received mine and looked at it from the same angle it became obvious that it was a completely different device that customer was complaining about and this one does not support standard mounts.

If you peel back the soft surface that touches the front of the vent where the labels are printed and the clear plastic layer underneath, you will find two small screws near where the retractable vent blade hook extends.

After removing those screws, the base will come apart.

Part of the base will still be attached to the ball joint by four screws. Remove that part too.

My previous car mount used a ball joint, but the genders were reversed from this one. I unscrewed the screw holding the ball part from the mount to reveal a 6mm square peg, and made this adapter to fit that peg.

First, attach this part to the square peg using the screw that used to hold the ball in place. Then, paying attention to the two small pegs, insert the B2933 into the socket and attach it using the four screws from the original mount.