You would do it this way if you were planning on using your battery packs in series. It avoids using an additional connector. But you must be VERY CAREFUL(!!!!!!!!) you don't short your battery.
Otherwise, it is much safer to have the females on the battery and the males on the ESC. You'd need to use an additional connector to connect batteries in series, by you're much less likely to short a battery.
By the way, Deans Ultra connectors (shown above in the picture) have low resistance and are good up to 100amps. They are also what most people who fly electric use.

JMHO,

Terry