In theory the largest AWG cable should be used on the power distributor, but what if one cable is 10 AWG copper and the other is 11 AWG silver- which has less resistance? Both these cables are copper/silver hybrids so it is not that simple.
In practice you are going to need to try both ways and see which you prefer.
The Zavfino Silver Dart is a 10 gauge cable, are you saying the Ansuz P2 is larger than that? (smaller gauge that is)
And here is the technology or "padding" in the Silver Dart: