MP 1,1-5,1 Mac Pro 5.1 Radeon vega 56 what are the appropriate power cables?

[miuipower]

hello, good afternoon, I wanted to ask, I have an ati vega 56, but of course mine has two pinew 8 pins on the graphics card and there are two on the motherboard to put mini 6 pins on it, but of course one cable already has both cables to mini 6, my question is yes The grace has two, my i 8 pin, how many cables to connect, I have this question, can someone tell me which cables to buy, thanks, excuse my English, I use a translator