Need to rewire the rotten cable on my original excal II headphones. Just added a CTX endcap to my excal and bought a set of Tony E's phones with CTX connector. Want to fix the yellow Koss phones as a backup with a CTX plug. If you have Red and Black wires coming off of the PCB, how do I make the splice at the phones cable that has Red,Black,Yellow and White. It appears that the Black and Yellow are paired and the Red and White are paired. Any help would be appreciated.