The two SAE connectors, one male and one female allow you to still have a SAE power port even with the Hydra plugged in, i.e. it is a splitter. TAPP uses so little power it's a waste to have the SAE plug totally used with it.
With this arrangement you plug in the TAPP and still have an SAE available to plug in other stuff.
We are working on another Hydra idea that would have just the USB sockets split off of one high power regulator. We can't do it with TAPP Lite since it only supplies 1A total. That would be too limiting split three ways.