In your picture it looks like your onboard charger is connected to your fuse block ? I thought about that but didn’t know if that would be ok.
The negative charger lead was connected to the fuse block. The positive lead, as well as the positive feed for the auto-bilge pump, are connected together and run to the positive battery terminal. What I also had was a main battery disconnect switch, which the outboard positive & fuse panel were connected to.
HRG