Very poor support brace/anchor design. Clearly the instructions written to find wall stud was with good intentions and common sense, but the self support was not designed with that capability in mind.

The width and pre-drill mount holes are to far apart, wider than a standard wall stud and truly miss the idea if centered.  Picture show it on a standard stud, the holes are to the outer edge of stud. The screws will split or bore out the edge of the stud.

So plan on one side being drilled in to the stud. While the other side is through drywall, and I do not recommend using the cheap anchoring plastic pieces hole threaders. Buy better  supports (pictured), which I used to avoid the stud all together thereby maintaing the integrity of my wall studs too.

Also note. They clearly were not thinking of the installer/installation.

Predrilled holes line up directly in the way of the hing screws.