Boat Trailer Wiring Harness Replacement

Would running a new style rectifier with no ground on a 74 merc 500 Connectors prong lakes boating 5 pin trailer wiring harness

Holley 534-146 LTS Replacement Main Wiring Harness

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Terminal block style complete boat wiring harness

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30 ft. boat wiring harness, wired for voltmeter and mercury style

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