A Dell Dock Vesa mounting bracket designed to sit between the monitor and the mounting bracket. Compatible with 75mm and 100mm.
The mounting plate rests in the vesa plate, which makes installation and replacement of cables easier. It uses the WD19TBS dock perfectly fine with this setup. Minimal flexibility when loaded and wired, so we'll call that a win.
Despite the fact that the product has many different functions, it is not the most aesthetically pleasing. But it's behind the screen anyway, so it's less important. Feel free to mix or add suggestions.