You can but shrink connectors now at Home Depot, Menards, etc. Basically they look like a Butt connector, but have solder inside. Works like a charm, just put the wires in each end, untwisted so the strands integrate, then heat with a heat gun or blow driver (if hot enough).

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85