Drone Battery Wire Soldering

I need a precise, low-resistance solder joint made on the battery leads of my drone. The task is straightforward: take the existing electrical wire coming from the battery pack and solder it securely to the designated battery connection pads/connector on the airframe... (Budget: $14 - $30 NZD, Jobs: Circuit Design, Electrical Engineering, Electronics, Engineering, Mechanical Engineering, Microcontroller, PCB Design and Layout, Soldering)