This repo contains openscad file for rendering models for 3d printing for adding USBC to the front panel as well as LED's for HDD / LAN activity (3nn LED). I have also included pre rendered STL models in repo.
Example of what the models look like in OpenScad
I have designed the models for printing with a resin printer, however filament printer should work fine too. After printing slap off / cut the legs of as shown below...
For the SuperIO part the following USBC board is used...
Which is available from amazon as an example...
The USBC board should have wires soldered to top of board not thru vias.
Ones USBC board / LEDS's are in place use wither hot glue or superglue to hold in place.