The mount gets screwed into the print head by temporarily removing the 2 screws on the right with 2 M3x7mm bolts.
The kusba is mounted with 2 M3x6mm bolts.
The holes to mount the kusba are designed to be threaded with the bolt as its being screwed in.
I added a simpler bed mount based on my ender 3 kusba mount as I had no luck printing the screw holes horizontally (age old problem of course but the v3 seems to struggle a lot more than my v1)
Can use with this cover and M3x12mm bolts:
https://github.com/xbst/KUSBA/blob/main/Mounts/SB_cover.stl
17th March 2024 - I have uploaded all the model files with smaller holes as in some cases the holes as printed were too big for M3, not sure why.
I found best results with the simple bed mount were it lying upside down, and putting support blockers on the holes and tree supports elsewhere, I have attached a screenshot of the resulting slicing in orca slicer. I cannot get them to print well side ways so having supports works better for me.
The author remixed this model.
I copied the concept of the bed mount, but used my model for the hotend as a basis for it.
I copied the idea of the mount approach from soonsoon model, but redid the model from scratch in freecad.