Not exactly schematics, but [Duckman] has some Arduino pinout diagrams he made using ASCII-art. ... But they clearly documented the circuit, and can still be read today. In the early 1980’s, ...

As explained by Arduino to Go, each color band on the resistor corresponds to a number but this can differ depending on the band's placement.It's not complicated, but the sheer number of colors ...

Connect one of the servo’s yellow signal wires directly to Arduino pin 9, and the other servo’s signal wire directly to Arduino pin 10, as shown in the circuit diagram in Figure 10-4. 3.