Is the terminal of the wire tin-stained or tin-stained again?

Wire ends are connected and then dipped in tin.

1. Connect the wire connector first.

2. Apply solder paste after connection.

3. Melt tin.

4. Put the wire coated with solder paste into tin water. It is not necessary to treat the wire joint with tin, but it is better to treat it with tin. The main function of tin plating is to ensure the reliable connection of wire joints and avoid unimaginable circuit safety problems caused by weak heating of joints.