Inserting Locking Pin
A rubber bumper is pinned on one end of the lock pin by means of a lead pin, and the lock pin is then slipped into place with the lock pin insulating washer placed between the outside negative plates and the wood separators. (See Fig. 312.)
A rubber bumper is then slipped over the other end of the lock pin and secured by a lead pin.
Place element on wooden blocks and fasten cover, as shown in Fig. 313.