Banana Socket Coupler. Conec2 2 x Banana Socket Coupler Snap-in Module Banana Socket to Banana Socket Coupler Simply snaps into place in Conec2 (50mm) Faceplates. The Conec2 CLB50-BB is a 50mm Banana Socket Coupler Snap-in Module featuring 2 x Banana Socket on the front and rear of the module.