There has been a lot of discussion here about adapters/connectors.
I have plugged in many keyboards, using many adapters/connectors, which have worked properly 95%+ of the time even using the lowest/cheapest plugs/models available, if I did a cold hard re-boot in between.
Really, the only significant problems I have experienced have been when I was plugging into a laptop not using line current (ie battery power only), so that there was some question or doubt about pure motivating force available to the external keyboard itself.
But I am not an electrical engineer, by any means.