This accessory consists of vertical rear connections for the 4-pole retractable ComPact NS 630b-1600 and Masterpact NT 06-16. They are designed to fit the chassis of the withdrawal device. These vertical rear connections are intended for bottom mounting. In plug-in technology, cables with lugs can be adapted with some accessories. The distance is 70 mm and the width of the terminals is 44 mm. They are sold as a 4-piece set.