Nothing wrong with it. You can buy spools of quality wire in different colors from McMaster and others. What is critical is the connectors and that you pay special attention to terminating the wires properly.
There should be 2 wire sizes (gauge) in that kit. The thinner wires lead TO the mUnit. The thicker wires run FROM the mUnit to the component (light, coils, signals, etc). The reason is the wires heading to the mUnit from your handlebar controls only carry a “ground” signal. The wires running to the component carry power. This differs from the stock setup where power was sent through the handlebar controls then to the component.
If you are using stock type controls, then you will have some “configuring” to do. If you post up pictures of the left and right hand switch controls, I can tell you what goes where and save you some headaches.