To solder them, heat up the terminal and the wire with the soldering iron, and apply some solder to them, until they form a solid joint. Repeat this for all the wires and connectors that you want ...

The solder should be fed into the “cool” side away from the heat, which allows it to be drawn in smoothly by the heat transfer through the wires. Once the connection evenly turns the correct silver ...

The most secure and durable way to splice two wires together is to solder them. Period. Use nothing but 60-40 rosin-core solder intended for electrical wiring. You'll also need some PVC shrink tube.

Every soldering station on an assembly line will have three things. A roll of brand new solder, flux (I like Kester 951, you can buy it in a pen), and a nice soldering iron. That’s all you need.