How to Splice Wires: 7 Easy-to-Follow Steps — Bob Vila
The Correct Way to T-Splice an Automotive Wire Without Solder - YouTube
splicing - How can I make a splice in a 30 amp 240 circuit? - Home Improvement Stack Exchange
Cold Splice Wire Tap (UB) - 10 pack : ID 1494 : $2.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Working with Wire - SparkFun Learn
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Brightfour Low Voltage Wire splice connectors - Pack of 12 Quick Solderless T Tap Connector 1 Pin,Rock Solid Connector for 24-20 AWG Cable for Vehicle/audio/video/Lighting and Automotive Uses - Amazon.com