Civivi Elementum Button Lock - Scales

Scales for the Civivi Elementum Button Lock (C2103-*) knife. I went with a smooth surface, I printed it in Bambu PLA (matte & regular) and it's been holding up fine for months now; most of the pressure isn't on the plastic/scales so in my experience it works fine with .2mm layer height. How to install these scales?I personally just watched a YouTube assembly/disassembly guide.