"They also left instructions on how to wire the pins! These instructions were painted as symbols onto the floor and represent a simple wiring diagram. The uppermost symbol – depicted as a number 5 with the lower loop almost closed, represents the left connector through which the pin is pushed until the end of the loop meets the limestone. The pin was probably tapered at the end which allowed it to enter the loop and gradually push it open while the connector loop held onto the pin as it tried to achieve its original shape. The vertical leg of this connector is not to scale (as very few wiring diagrams are) but the actual connector probably had a longer vertical leg up to the point when it is bent at right angles towards the center of the block.
The center symbol that shows a round circle with a forked line below it could represent the cable through which electricity flowed. It is positioned between the upper and lower connector symbols on the floor as the flexible conduit is positioned between the right and left pins in the USO.
The lower connector symbol is roughly similar to the upper with the exception of the top bend, which could go right or left as when installed it wouldn’t matter which way the loop was turned.
All the symbols, including the line (which would logically represent the main cable coming from the USO) were more than likely positioned on the side that would identify the positive electrode. This is supported by the appearance of a greater amount of corrosion on the loop on the side where the symbols appear.
All of that which is revealed by the Djedi robot describes an electrical device which was accessible to workers for maintenance. Considering the erosion on the pins in the main shaft (the negative electrode having broken off in antiquity) and considering the extreme tapering that was more than likely caused by the rise and fall of a corrosive liquid, another significant conclusion that can be made is that these electrodes must have been replaced periodically. At the same time, the electrical cables were probably replaced and some of the shielding was left in the space. The entire design supports this view! The pins were made so that they could be removed easily and another one put in its place. Also, seating the lower loop into a blind hole would prevent the electrode from turning in the hole. After it was seated in position, the pin protruding into the main shaft would be bent 90 degrees and fixed securely in operating position.
Gantenbrink’s Upuaut II also revealed another important feature about the electrodes. After they were positioned in the hole, a sealant was applied..."