3.5mm bullet connectors soldering tip:
- Drill three 3/16 inch holes about 1/4 inch deep and 1/2 inch apart in a small board.
- Insert a 3.5mm connector in each hole, with the end to be soldered upright.
- Heat a connector with a soldering iron and melt a little solder into it, then insert the wire into the melted solder.
- Move the soldering iron away from the connector and hold the wire in place until the solder solidifies. Works like a charm, and you don't need three hands!