2-Conductor Splicing Wire Connector (100-Pack) PTA-S02-100 - The Home Depot
Gardner Bender 16-14 AWG 0.156 in. Tab Snap Connector Butt Splice 5 Female and 5 Male, Blue (10-Pack) 15-163P - The Home Depot
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
Amazon.com: Low Voltage Wire Connector No Wire-Stripping Required H Type 2 Pin Wire Splice Connectors for Lighting Toy Audio Vehicle Audio Automotive Video Uses (JXB-H2 25pcs) : Electronics