As Robert explains there is only really one “interesting” connection per optical sensor, that one wire can be connected to almost any gpio pin as long as you edit the sketch to use that gpio pin.
In my example script there are 2 gpio pins defined as this script happened to be used with 2 optical sensors.
The pins I used were as follows (physical pin numbers used rather than BCM/GPIO numbering for RPI GPIO)
| optical sensor | RPi |
|---|---|
| 1 (nc) | |
| 2 (vcc) | Pin 17 (vcc) |
| 3 (nc) | |
| 4 (nc) | |
| 5 (gnd) | Pin 9 (gnd) |
| 6 (output) | Pin 13 or 15 |
| 7 (nc) | |
| 8 (nc) |
Note I used 3.3V rather than 5V to power the sensor as the Pi gpio input pins are not 5V tolerant and the sensor is designed to work at both 3.3V and 5V.