The proper way is to remove your dash. Then disconnect the junction box and pull the harness all the way to the front of the car and relocate the harness across the strut tower.
It's a lot of work but it's the best way.
The only thing left to do is to fix that one wire. You can cut out the old wire and solder in a new wire in its place, or put weatherproof heatshrink over the wire to insulate it.
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