Iron-On Vinyl. Iron the sequin fabric on Iron-On Vinyl and cut to size (your ribbon size). Highly suggest a rotary cutter to get a clean edges. The Iron-On Vinyl is what helps/keeps/prevents the sequins fabric from fraying.
There's also a paid instructions at TRR
if you need the instructions. But if you do a Search in the forum, there's alot of tips that was discussed before on the How-Tos as well.