Question about CableMod C-Series PRO Kit RMi,RMx

Hi,
I can't tell you exactly why it's like that, but I think that's the case for everyone, isn't it? I have this Corsair power supply:

Corsair RM850x *2018* (850W)

And the CableMod cable definitely fits in there. The different wattage models are all the same in terms of the connections. I have connected it to an ASUS RTX 2080TI.

ASUS GeForce RTX 2080 Ti ROG STRIX O11G (11GB, High End)

I hope I could help you.
Have a nice weekend :)