My method is quite similar to the SuperSerpent one, but with a slight modification.
A Multiplex (MPX) battery connector goes from the receiver to a place in your chassis and the wires that came from battery use the same connector. This is quite different to the servo ones, so no place to fail to connect them, when connected grip themselves very tough so no worry to self disconnect when running.
Here is a very common battery connection method. Look at this
photo just for more details.