Testing polynomials which are easy to com-pute

This invention relates to a side wall terminal for a storage battery. The terminal includes a specially designed lead bushing adapted to be inserted through a side wall opening from the inside of the battery case. A portion of the bushing projects beyond the outside surface of the case and is surrounded by a lead locking ring. Disposed within the bushing is a hard, wear-resistant, internally threaded metallic nut used in connecting the terminal to an external cable. By means of a spinning operation the outer edge of the bushing is forced down and over the locking ring forming an integral assembly between the terminal and the side wall of the battery.