Behaviors Debug - Systems Electrical - will it ever be described?

No details on Electrical Debug? Any chance for some information, meanings and
how to fix connected=false?

The SU11 flighting (and soon to be public) documentation now has a section
included as part of the aircraft tutorial related to the electrical system and
how to debug it. This is still a WIP but hopefully offers you some help:
https://docs.flightsimulator.com/flighting/html/mergedProjects/How_To_Make_An_Aircraft/Contents/Files/Flight_Model/Electrical_Systems.htm
Additional information can be found on the section for the window itself too:
https://docs.flightsimulator.com/flighting/html/Developer_Mode/Menus/Windows/Behaviors_Debug.htm#systems