Extra wires on wiring harness

[mrtexas]

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I got a complete set of wiring for my 41 when I bought it but didn't get a schematic for only the dash harness. The tail light harness had extra wires for turn signals which is handy however the head light harness didn't. I added an extra wire for an electric fuel pump and an extra for driver park light and used the existing wire for the passenger side park light. Lack of schematic caused extended testing and thinking to figure it out. Finally got everything working today.

Pictured is the under hood headlight/coil section harness. Don't think this harness is for a 41 as it has three extra wires yellow, black, and green that I didn't use. The wires come out of the firewall and then re-appear around a foot later near the horn. Harness does have wires for the horn.

Anyone know what year the harness is for and what the three extra wires are for?