Here is a trick that I have done before. Take some fine copper wire strand, wrap it tightly around another stiffer wire, get it about 2" to 3" inches in length, paint the wound part black. slide it off of the stiffer wire. Now you have a convincing split loom. You can sand off some of the kits wiring detail , and glue on the improved looking stuff, it remains flexable, routable, and you can add some of the thinner wire bits to it easily, allowing you to connect wires to Alternators, Voltage Regulators, Wiper Motors, any accessory found under the hood.