I don't want to be to intrusive on the washing machine so i built a cable harness today to keep the ESP and analog mux separate from the LED sensor board. Cut the ends off a DB9 serial cable and crimped on some single row 9 pin headers. Don't think i will need all 9. Only 6 sensor data lines and 1 power line going to sensor board....I may need ground too... will require testing. But for now i only need 7 wires and i have 9 so i should be covered in case the design changes.