OK I am a bit busy right now
I dont exactly know whats inside a coil like that someone else chime in
Now for experimental progress . If you have both points connected and battery goes down
Either it is the supply --Weak battery or consumer A partial short somewhere
I would probably disconnect the Left and Right points both and then connect only the right and observe if the Voltage drops
or something else both connected and disconnect left
If it drops so I would at this point in time assume a partial short in the circuit for that Right Point
Maybe disconnect the condenser also
Put it like this if the left point is disconnected and the Condenser And you get a voltage drop via the right point connected / disconnected
There is only one wire ..and something to work on
View attachment 248162