I used the cables that came with the powersupply and plugged them into the adapter for the FE GPUs. 1 never booted the other worked for 3 days third is still working.

Edit: This being the Adapter I am talking about but the one that came with the GPU and not this random amazon one https://www.amazon.com/LINKUP-Compatible-PCI-Adapter%E2%94%8330cm-300mm%E2%94%83Silver/dp/B08Z5QYMFR