Note that there is wiring not shown in the picture which is
a second electrical connection to the positive side of the battery heading downward, separate from the connection you see which heads to the fuse (shown in the right side of the picture) mounted near the front of the vehicle.
Not exact matches
The
second corresponds to a removable prosthesis, maintaining a mechanical
connection with the bone and an
electrical connection with the implanted electrodes.
Multiply all those
electrical lines and power stations with their
connections by a million times, and you start approaching what occurs every
second in the mammalian brain.