Damn, I threw out the bottoms :(.
The following method gives good results when joining two wires.
Liquid flux improves the soldering process.
Ceramic tweezers 'do not' absorb heat during the soldering process, however, stainless steel tweezers can be used too.
After tinning the ends, it is time to solder the two wires together.
Flat nose pliers are used to level the center section of the tinned ends.
Ceramic tweezers are used to hold the wires during the soldering process.
When it comes to more than two wires, use a 30 AWG wire strand tied in a simple ‘overhand’ or ‘larks head’ knot.