Order the 3.5 mm Male to Screw Terminal Connector - SoundImports
Uninsulated Ring Terminal to fit 3.5mm Stud, Conductor Size 0.5-1.5mm, Pack of 100
3.5mm Male to Screw Terminal Connector, Ancable 2-Pack 1/8 Inch TRS Stereo Male Plug to 3-Pole Soldless Screw Block for AUX Cable, Speaker and Headphone Wire: Amazon.co.uk: Electronics & Photo
3.5 mm Stereo Female Terminal Block 3 pin Audio Adapter - Electrical connectors - Power Cables - Cables and Sockets
Sourcingmap 3.5mm (1/8inches) Stereo Male to 3-Screw Terminal Female Connector Adapter: Amazon.co.uk: Electronics & Photo