Cupchain connector was designed specifically to accommodate 2mm cupchain. Simply add a dab of glue to secure, place cupchain in connector, push down then bend 2 prongs over with pliers. Connector can also fit other types of cube beads smaller than 2mm in size.
Chain Terminator>Silver Plated/Finished>Silver ColoredFindings and Components>Terminators>Chain TerminatorSilver Plated/FinishedSilver Coloredhttp://www.firemountaingems.com/itemdetails/h20a6172fnH20A6172FNConnector, silver-finished brass, 2.5x2.5mm, fits 2mm cupchain. Sold per pkg of 50.//image2.fmgstatic.com/images/pa6172fnb.jpg4.734.73As Low As $0.04 per connector