On the left you see the pinout for the snes controller.
The connection between the GPIOs and the adapter board is as following:
CC (3.3V) white: pin 1
Ground brown: pin 6
Clock yellow: pin 19 (out)
Latch/strobe orange: pin 23 (out)
Data 1 red : pin 7 (in)
install retropie: https://github.com/petrockblog/Retr
oPie-Setup
stereo amplifier with recycled piece from old stereo: KA2206B chip with pinouts:
alternative: