One argument against soldered connections is that the molten solder can wick
up into the stranded wire and stiffen the wire back to a hard spot which, being
concealed by the insulation, can fatigue without being seen.



QLW wrote:

I usually solder connector on my boat and have never found this to fail.
I've never see this done but the manufacturers so there must be some
negative reason but I've not found it.