I printed the "top" part back-side-down with tree-support touching buildplate in Cura. The other parts do not need support. I used 4 M3x6x5 brass threaded inserts that I melted into the holes in the top-part 4 M3x12 screws are needed to mount the bottom to the top part.
With my printer-tolerances I was able to snug-fit the original charging cables in the respective holes. You can print 4 (2 for each charger) inserts to put behind the USB-C connector if needed to keep everything in place.