50 pieces Heat Shrink Butt Wire Crimp Connector
Red fits 22 – 18 ga wire
Blue fits 16 – 14 ga wire
Yellow fits 12 – 10 ga wire
Just crimp and use a heat gun to heat shrink the ends around the wire.
You can find a video on how to use them by watching the How to Replace pixel video at http://videos.cfolights.com/index.php/basic-series/