Had to do something similar for my recent remodeling job. You can get shrink/solder connectors all in one. I think I just used a wagnor hot air gun and it made a permanent connection.

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M80s-VP180-QS8s-EP600-2xEP350 Denon3808 Outlaw7700
M22-OWM22-VP100-Denon2805
Audio Nirvana