Oh, I agree fully with that, Jester. Simple is always best. Adding components, even an extra connector, can be problematic... can be.. not will be.

The problem with wire in a connection like that is that the size of the wire becomes a big factor in what is delivered to the ESC and ultimately the motor. The bigger the wire, the better, howerver, there are practical limits to that. And, a good "engineering" practice (hey.. just a term here.. not offering enginnering information) is to keep all wires the same size.

Just like a chain, the weakest link theory.. the delivered amperage will be limited by the smallest wire in the path.

One connector between the battery and the ESC.. meaning one male - female pair, is the simplest thus the best way to go.

CGr.