The programmable speaker doesn't have that field, which is annoying because I can never remember exactly what signal the accumulator puts out for charge percent when I'm hooking one up... (Confirmed by a second player on the discord mod-making channel.)Hovering over the circuit network id in the entity circuit control window will now show a tooltip with the circuit network contents.
Seems like an oversight in the original work, but hopefully one that is easy and fast to fix. Thanks!