To use simply insert both wires to attach and using crimping press close it.
eBay
DIY 3.5mm Jack Audio Plug 3 4 Pole Earphone Connector For Soldering Hifi Headphone Upgrade Wire 3.5 Conector Gold Plated
Aliexpress UK
Stable Connection: The brass Amp input reducers provide a secure and stable connection, minimizing the risk of disconnections or sound interference. Easy Installation: The Amp input reducers makes installation a breeze with its simple design, suitable for car sound enthusiasts and professionals alike, no special tools or skills required.
eBay
50Pcs K1 K2 K3 Connector UY1 UY2 UR Wire Connector, Waterproof RJ45 RJ11 Telephone UY Splice Connector Network Cable Terminals
Aliexpress UK
High quality product as used by BT engineers, made by DexGreen. The wires do not need to be stripped as the IDC connection in the crimp does that for you. They are very simple to use, insert one wire in each hole and just squeeze down using pliers.
eBay
GTRIC Lever Wire Connectors 2/3 Way Mini Parallel Wire Connector 450V 32A Quick Wire Connector With Mounting Hole Terminal Block
Aliexpress UK
40 x K2 UY2 Connector. UR2: 0.4-0.9 mm²/AWG 19-26. UR2: 2.08mm. 20 x UR2 Connector. UG: 0.4-0.9 mm²/AWG 19-26. UG: 1.67mm. 20 x UG Connector. 50 x K1 UY Connectorr.
eBay
20/50/100 Pcs Double-Wire Plug-in Connector with Locking Buckle-Pluggable LED Wire Connectors 2 Pin Electrical Wire Connector
Aliexpress UK
They are very simple to use, insert one wire in each hole and just squeeze down using pliers.
eBay
Way Low Voltage Universal Compact Wire T Tap Connectors Toolless Wire Connectors Quick Splice Wire Wiring Connector
Aliexpress UK
The wires do not need to be stripped as the IDC connection in the crimp does that for you. High quality product as used by BT engineers, made by DexGreen. They are very simple to use, insert one wire in each hole and just squeeze down using pliers.
eBay
20/40/60/100 Pcs Double-Wire Plug-in Connector with Locking Buckle-Pluggable LED Wire Connectors 2 Way Electrical Wire Connector
Aliexpress UK
They are very simple to use, insert one wire in each hole and just squeeze down using pliers. The wires do not need to be stripped as the IDC connection in the crimp does that for you.
eBay
1-50pcs Double-Wire Plug-in Connector 2 Pin 2 Way Pluggable LED Wire Connector Universal Car Wire Cable Electrical Connector
Aliexpress UK
The wires do not need to be stripped as the IDC connection in the crimp does that for you. High quality product as used by BT engineers, made by DexGreen. They are very simple to use, insert one wire in each hole and just squeeze down using pliers.
eBay
26PCS Lever Wire Connectors, 1 in 2 Out &1 in 3 Out &1 in 5 Out Quick Wire Connectors, Electrical Lever Nuts Wire Connectors
Aliexpress UK