It's like these guys didn't learn anything from the simplicity of some of the best connectors ever made: phono plug in various sizes, including the ubiquitous 3.5mm and of course the trusty "RCA" connector. Forget the physical attachment aspects if you like, but the no-nonsense insertion aspect is very appealing.

This kind of orientation-agnostic connection dates back millions of years and still works as well today as it always has.