GPU installation (help)

Hi guys,

First time builder here,

just want to clarify the PSU
Cable that is used onto the graphic card,

I have Corsair Rm750e PSU and Sapphire RX 9060XT 16gb GPU,

The cable I got from Corsair for the GPU from the 12v 2x6 has 2 PCIE cable at the end of it, just wondering if its ok to just use one and ignore the other one? Or should I just use the cable with both end PCIE cable and don’t use the 12v 2x6 cable at all?

Thanks for the help!!