I just called the shop, they said they saw my emails and they don't have cables from the same brand of the PSU and that they are unsure that a different brand of cables would be compatible with my PSU.
Is this correct? Would a different brand of cables harm my PSU?
If it fits and works it wiull be fine as it will be wired the same as the original anyway. The best thing to do perhaps is to bring your pc to that shop and check, that way you don't have to travel all the way back to return it if needs be.
This is what I'm going to do.
I cancelled my order from the first shop and I asked a second shop about the cables, the guy said he will have an answer by tomorrow but it's probably not a problem, he can get the cables. And I will take my PC to his shop and install it there.
Hopefully it'll all work out.