Headset cable broken cannot rewire

So after using the HyperX Cloud 2 for like 7 months I cannot hear anything from the right ear cup.

This happened when I was playing CS:GO.

I played several times with the cable going up in the headband, that's why the cable broke. (Check image)

(It's actually the other cable going up in the headband that broke)

I tried to wire them back and plug it in. It didn't work because the green wire has a special coating ? (Check Image)

(Not the broken wire)

(The broken wire)

Now only the mic and the left ear cup is working, what can I do to fix the wire problem ?

I tried to wire them back together but it didn't work because of the special coating i'm guessing ?