Soldered.

I didn't much fancy the idea of using the crimp type cable end ferrules that appear universal on pushbike brake cables these days, so I soldered the end instead to hopefully stop fraying.
The old cables were a bit short to enable me to raise the handlebars a little bit so I fitted new cables. At my age and health a racing crouch is a fearsome prospect.
Solder is a word that due to the quirks of regional dialects American's are unable to pronounce, it comes across as a brand of wonder soap.