Hello! There's unfortunately not much I can do about that at the moment. The docks are actually accumulators, and they need to store energy. It only store's 1 Joule though (for reference, the vanilla accumulator stores 5 000 000 Joule), so it's negligible.
However, I plan on changing this to support a circuit connection at some point, as mentioned here, because that would be cool. I'm just a little busy at the moment, so not sure when I'll get around to it. But when I do, it won't store electricity, or show up in the Electric Network anymore.
Thanks for the report!