The 2020 scale used a plastic cable port cover that bolts into the frame behind the headtube.
This cover accepts a rubber grommet. There are a few different iterations of the rubber grommet available. 1 cable, 2 cable, 2 cable +hose, 1 cable +di2, 1 cable +live valve.
If you don’t have the alternative rubber inserts, you can actually just poke a hole in the free space and push a cable outer through.
The scale prior to this (till 2017) used an alloy cable cover with pre drilled holes. I guess you’d have to go back to the bike before this to get round single cable sized holes straight in the frame.
If you believe you have a 2020 scale with single cable hole straight in the carbon and no cable port, then you might not have a real Scott.