HDJ 2000 MK2 wire problem

Hey,

so I have problem with my MK2. Right side is working properly and left side is working only when I hit right side few times. So today I opened my headphones and I saw where is the problem. Little wire that is going from right side to left is pressed and it is loosing contact. 

What can I do about that. Headphones are working like charm but this wire is giving me headache.

Here is picture where is the problem right where headphones bend:

https://i.imgur.com/MeF71yD.jpg