68 Dart engine harness jumper wire

I've got the original harness and the replacement M&H harness side by side. The original harness has a short brown jumper wire on one of the bulkhead connectors. The new harness doesn't have this jumper wire. I'm wondering if other 68 harnesses have this wire or if it was added at some point. If it's original, what is its purpose?

The jumper wire goes from the red wire to the black wire w/yellow tracer. According to a wiring diagram, the red wire goes to the high beam plugs and the black wire goes to the parking lights. The brown jumper looks factory. It has a little loop on each end that helps it stay in the bulkhead connector.

Would this jumper cause the parking lights to come on with the high beams?

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