Gameshell missing C3 cable

I have been waiting for months and am excited to get my Gameshell when it got shipped. Turn out there is no C3 cable to connect the keyboard and the motherboard. However, I receive an extra C2 cable. Now, what should I do? I tried to email customer service but even if they ship the replacement cable I am afraid that I have to wait several months for a cable. Is there any solution to this, is there any cable similar on Amazon? Any help is appreciated.

The Gameshell is on but I just can’t use it :(((((