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I would strongly suggest crimping unless you are already expert at
electrical soldering (in which case you wouldn't have posted this
question). Crimping is much easier to get right and reliable (in
spite of the unjustified scare storey floating around here) starting
from an untrained position on either side and it is standard electrical
practice, whereas soldering isn't. Use insulated crimps and a proper
ratchet crimper, and do some practice runs.

I would second that - much easier and reliable

Mike