Batteries connections schema
 
Services Battery Optima YT S 4,2 Services Switch Engine Start Switch Parallel Switch Main Switch Volvo Penta MD11C Services Battery Optima YT S 4,2 Battery Charger Quick ADV250 Plus Battery Control Cockpit Engine Start Battery Optima RT S 4,2

Legenda:     red line Positive wire      black line Negative wire     blue line Control wire

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