No idea, it was hidden behind the housing of the Mini-Fit Jr connector. Undersized wires tend to heat up at the weakest link because this is where the resistance is the highest, so the this should be in the terminals.
If I did it manually - I'd solder the cable onto the terminal for a stable connection, but this takes a lot of effort.
your power supply is fully modular. you need to make sure you have two 6 pin VGA cables to supply your 3070 ti.
the regular 3070 only needs 8 pins. like this