Apparently crimping is the way to do it today. Apparently that's because nobody knows how to solder.Pity! In 40 years of soldering wires and plumbing I've never had a failure that could be credited to faulty solder or silver solder. Choice !! What I do recommend is self vulcanizing rubber tape. Electricians use it for high voltage stuff. Peel the backing paper off and its permanent to itself and the wires insulation.I like it better than heat shrink even if it's over a crimp.