Vernier does not sell the SensorDAQ screw terminal. You can purchase these from various electronic stores. One example that we know works is available from DigiKey and made by Phoenix Contact. This is described as a 12 Position Terminal Block Plug, Female Sockets 0.150″ (3.81mm) 180° Free Hanging (In-Line).

National Instruments LabVIEW Troubleshooting and FAQs
SensorDAQ Troubleshooting and FAQ