Modding Help and advice requested for my Antec 1200 header modification

The aim is to do something like this: http://forums.bit-tech.net/showthread.php?t=208880
for my thread here: http://forums.bit-tech.net/showthread.php?t=279482

I've got an issue trying to figure out how to get to the wires inside without cutting up everything.



Any tips or advice?

My first thought (when the thumb gets a little better) is to cut off the section at the back so that I can lift out ALL of the white bits.

After that I'm not too sure how I'm going to manage to dig out that one wire that needs snipping to get rid of feedback on the headphone jacks.

I can see that along the top the USB wire is a little exposed (SO glad I didn't cut that in error).

 

What are you trying to do to it, its not obvious from the thread.

 

Updated. Aim is to fix this like the 300/900's like this: http://forums.bit-tech.net/showthread.php?t=208880

radically different though