BANANENSTECKER VE = 4 ST. MESS. VERG. BS10G/SB Gold plated banana plug for wire up to 10 mm2. To open up the plug the two parts (split is roughly in the centre of the grip) need to be twisted anticlockwise. The wire is then inserted through the visible opening on the side. To close the plug just twist the two parts clockwise. . Also accepts rear-entry banana plugs for stacking.