Power cable for card

[BTRY B 529th FA BN]

Hello. I just purchased an video card for my old machine and the card uses a native 8pin power connector. My power supply offers a cable for this. The one side has a 6+2 (8pin) *(red in color)* connector and the other has one 6 pin(red in color) & one 5 pin (black in color)for a total of 2 connectors. I'm pretty sure where the 8 pin goes and the red 6 pin go but what about the black 5 pin? does that also get plugged into the PSU?