another amp meter bypass question?

Dubob said

If your doing the mad wiring, the black is used as another conductor for power to the inside of the car thru the bulk head connector, this increases the actual gauge of the wire carrying the load. Here's the diagram from the mad website if it helps. The black and red share a fuse link at the power source. This protects the complete run of both wires. Hope this helps.

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I was wondering if just leaving the wires plugged together at the bulkhead now would do the same thing or cause a problem?? I just wanted to run a new black from the alternator to the starter relay and then just leave the bulkhead connections as is? Power thru the black from the alternator to the starter relay, thru the red fusible link and continue thru the red/black splice where the ampmeter was. But leave the black from the ampmeter splice in the bulkhead and pluf the engine harness black into it? What would the end result be??