I have replaced my wiring harness using this guide, I could not open the boot so i had to go through the back seat, removed the carpet trim from inside and manage to connect the new harness without removing the three 10mm bolts and opened the boot.
Without this guide i would of taken this to my local garage for repair.
I have attached pictures of the damaged harness.
IMG_0305.JPG
IMG_0306.JPG