Strip roughly 2mm of the wire insulation back and tin the wire end. Add flux to a Female 2mm Bullet Connector and then apply heat to the outer casing while adding solder to the wire cavity.Use a tweezer to hold the bullet connector, apply heat to the outer casingWhile still applying heat to the outer casing, slip the bullet connector over the wire. Remove heat and hold until the solder can cool.Cut a 20mm length of heat shrink. This is 2.5/1.25 heat shrink.Slip the heat shrink tube over the 2mm Bullet Connector, aligning the connecting end of the bullet connector with the edge of the heat shrink tubing.Apply heat to the shrink tubing. Start at the connector end and work away, this will keep the ends in place and flush.Rinse and repeat.