1. Preparation work. Make sure the welding environment is well ventilated and wear appropriate protective equipment such as goggles and gloves. Prepare the required tools and materials, including soldering iron, solder wire, tweezers, cables, etc.
2. Clean the plugs and lines. Use an alcohol swab or cleaner to carefully wipe the plug and cord connection points to make sure they are free of dust, grease, or other dirt. This will help with good contact and strength of the weld.
3. Hot melt welding. Heat the soldering iron until it reaches the proper operating temperature. Place the solder wire on the soldering iron tip and allow it to melt to form molten solder.
4. Welding connection. Use a soldering iron to apply molten solder to the connection points between the plug and the wiring. Make sure the solder fully coats the connection points and creates an even solder joint.
5. Cooling and solidification. Wait for the solder joint to cool and solidify. Do not move or twist the plug immediately after welding is completed to ensure the stability and reliability of the solder joint.