Instruction:
RaceMenu face presets are .jslot files, ok, got it. Now go to
Data\SKSE\Plugins\Chargen\Presets and extract file here;
if youre on MO2 (or regular MO) right click on Racemenu mod and tap open in explorer. Do the stuff mentioned above and done.
Once in Racemenu, go to the Presets tab on the upper right and load your new Preset!