You can try a wire loom. If that’s not good enough try a wire heat sleeve like so
Heat Protection Wire Sleeving, Heat Protection Wire Sleeving Products, Heat Protection Wire Sleeving Suppliers and Manufacturers at Alibaba.com. Or Google Wire Heat Protection. Something along that nature. I definitely recommend some sort of protection. What wire harness did you choose form Z1? How was the wire install where the instructions pretty easy to understand? Was all the hardware supplied? Does your fog light turn on with all the lights and stay on? Or on when breaks applied?