PCA9685 fans out 16 PWM 12-bit channels with instructions from the I2C port. Its address is set to 0x40. There are 16 PWM indexes printed on the PCB, but you don't really need to read them because the pin-mapping is done in the software. The physical wiring pattern is the same as the previous boards. You do need to check the direction of the servo pins. Regular servos have 3 pins for PWM, power(2S), and ground (GND). The ground should connect to the black wire of the servo.