"YourMod" as in "your mod name". I altered the paths to be more descriptive. Do tell if you think they are still lacking.
The given directory (Data/Mods/{YourModName}/CharacterCreation/RacePresets) is where race presets are placed. If the directory doesn't exist yet for your mod, you create it. The example preset is given in the link one line below and you place those files in that directory. Any of our existing game presets are located in the DivinityOrigins mod, which you need to
unpak if you want to take a look at the files.