If you have a spike game, you will have to plug into a spike to stern power adapter. The spike power adapter provides a stern plug on the left side of the game. The spike power adapter plugs into the node board on the left as shown below.
Note: there were only a small handful of spike 1 games. Spike 2 was released almost immediately and we have a more stable power source in the head for spike 2 games. However, the node board power connector can also be used.