This was my solution to get external power and network to the Pi4.
I got some extension cables for the USB-C and network cable.
USB-C - https://www.amazon.se/gp/product/B096XTG43J/ref=ppx_yo_dt_b_asin_title_o05_s00?ie=UTF8&psc=1
RJ45 - https://www.amazon.se/gp/product/B01EF000NM/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1
Then i pushed them in to the skirt.
There are no holes for the screws, as if you want or dont want to screw them in (depending on the USB-C size cable head for instance )
This is a “snug” fit to have them in place.
The author hasn't provided the model origin yet.