questions about battery disconnect wiring
To keep the ammeter as a useful indicator of battery charging and discharging, then the power connection to the relay must be kept on the alternator side of the ammeter. I would probably add both wires if keeping the ammeter. The reason is it provides a second path for the alternator power to get inside the car. The reason being that the original wire often has oxidation and sometimes damage at the bulkhead connector and elsewhere.
To keep the ammeter as a useful indicator of battery charging and discharging, then the power connection to the relay must be kept on the alternator side of the ammeter. I would probably add both wires if keeping the ammeter. The reason is it provides a second path for the alternator power to get inside the car. The reason being that the original wire often has oxidation and sometimes damage at the bulkhead connector and elsewhere.
