that is connected electrically both with the central bismuth core and the inner 2" sphere, will be sticking out slightly. Connect a wire to the end of this cathode bolt and shrink wrap it or tape with electrical tape - sealing any exposure of the metal to the air or any water it can contact. The length of the wire should be measured to be able to follow along the inside of the aluminum transfer tube and end at the engine block (for a blind plug connection) or some metallic component connected to the engine block.

اضغط هنا لمشاهدة الصورة بالحجم الطبيعي.
As seen in this picture on the right, this is an aluminum transfer tube, which an air-tight and water proof layer of PVC outside. The wire coming from the inside of the inner sphere, carrying the female energy and the neutral centre (what does this mean? - click here for some discussions on the theory behind the functioning of the Moe-Joe cell) will be brought to the engine through the inside of transfer tube. The aluminum of the tube should be contacting the outer sphere, and thus carrying the male. The female is carried by the wire to the engine block and should have an electrical connection right onto the engine block. The ending of the aluminum tube should not contact the engine block, and so some of the aluminum should be cut out at the end, to ensure that the PVC contacts the engine block and not the aluminum (which would short out the cell, since the ally tube is connected electrically to the outer sphere which will be charged with positive electricity from the battery)
With this blind plug option, DO NOT seal for AIR tightness the end of the ally tube where it meets the engine... gasses can accumulate in the transfer tube and cause an explosion. Just fix it to the engine block / head so that it doesn't move around and make sure it is not sealed tight, to allow the small amount of gas to leak out and not build up.