I see, but I am trying to find where cf_head_00_00_SSS.png, cf_head_00_thickness.png and cf_head_00_00_wet.png is. On
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it says when you downlowd the textures(which i did), you would get them but i can't seem to find them
Ok - I got it after some learning.
This is only a special feature for NextGen characters of Roy12.
If you read the first paragraph of the guide you´ve linked above you see, that Roy let you download the 3 extra files for NextGen SSS separately and you can apply them if you want, as explained in this guide further.
For example if you look at his HS2 Mods 3rd character on top "Christie"
First download link is all you need for the character, the SSS links are exactly these 3 files you asked for.
Best location for them I guess is UserData/Overlays/Face (create, if you don´t have yet). From there you pick them when you "Import Textures"
You don´t need them for NextGen chara cards from other creators, there is everything already included in the card or in an additionally zipmod.