If you’re heading to Jaycar for wire, don’t haha. Just kidding. If you really want to buy wire from Jaycar here are some suitable options. You will probably struggle with melted insulation and stiff wires though due to the stiff PVC insulation.
“Thin Wire” (Trigger switch and mag terminals)
“Thick Wire” (Power)
Get some Jaycar 6040 solder too while you are at it. Lead solder only! Jaycar has great solder. 0.71mm will make it easier to control solder flow.
Heatshrink to cover the mosfet to prevent shorts.
But if you want good quality wire buy silicone wire from Hobbyking or local RC stores.
Hobbyking has it cheapest.
Buy 18AWG for the power and 22-24AWG for switch and mag terminals.
If you need it local, Desert Aircraft is a good supplier of quality silicone wire.