I disliked the original position of the little pwm hub in my fractal torrent since I would have to cramp a lot of cables in the bottom left of the case, so I decided to mount it in the center, where one 3.5" HDD cage used to be.
This is a very simple model, I used three M3 screws+nuts to secure the PCB on the mount and two of the three screws, that were holding the PCB in its old home, to fix the mount to two mainboard mounting screw holes. Note that you can also use this mount on the screw holes where the two 3.5" cages are secured in. Using the mainboard screw holes let's you keep one of the cages though.
Make sure that the screws don't extend beyond the nuts to not push the entire mount against the case. For detailled measures, look at the (highly unprofessional) drawing in the images.
You can also find this model in my git repo.
Note that you will have to use some small supports to print this, no matter what side you print this on, there are overhangs that can't be printed. I recommend printing with the spacing for the nuts down (the side that's labelled “Bottom” in the drawing at the end of the readme).
The support settings in the 3mf file are servicable, not perfect.
You might damage your mainboard or other components here if you're not careful! This 3D model along with any documents or instructions are provided "as is", without any warranty of any kind.
If you break something, that's on you.
The author marked this model as their own original creation.