Drill a hole in the top of the earphones big enough for a three-conductor piece of ribbon wire to go through. This will connect the output of one LED ring to the input of the other. Leave plenty of slack in the wire, as you can always store it in the earphone but can't add more length later.This guide was first published on Aug 14, 2013. It was last updated on Dec 10, 2018. This page (Disassemble & Prep Headphones) was last updated on May 04, 2015.