The diagram below provides a general visual reference for wiring of the components once you get to the Assembly page. This diagram was created using the software package Fritzing.

Adafruit Library for Fritzing

Adafruit uses the Adafruit Fritzing parts library to create circuit diagrams for projects. You can download the library or just grab individual parts. Get the library and parts from GitHub - Adafruit Fritzing Parts.

Wired Connections

The Feather RP2350 is powered by a 3.7v 2200mAh lithium ion polymer battery. Wires connecting various components:

Feather RP2350 to ICS 43434
3V to VDD 
GND to GND
D9 to DOUT
D5 to BCLK
D6 to LRCL

Feather RP2350 to MAX98357A
3V to VIN
GND to GND
D11 to LRC
D10 to BCLK
SCL to DIN

Feather RP2350 to NeoPixel
Bat to 5VDC
GND to GND
D12 (GPIO4) to DATAIN

Feather RP2350 to Slide Potentiometer
3V to Pin 1 (VCC)
A0 to Pin 2 (Signal)
GND to Pin 3 (GND)

Feather RP2350 to Rotary Potentiometer A
GND to Pin 1
A1 to Pin 2
3V to Pin 3

Feather RP2350 to Rotary Potentiometer B
GND to Pin 1
A2 to Pin 2
3V to Pin 3

Feather RP2350 to Button A
A3 to Pin 1
GND to Pin 2

Feather RP2350 to Button B
D24 to Pin 1
GND to Pin 2

Feather RP2350 to Toggle Switch
D25 to Pin 1
GND to Pin 2

Feather RP2350 to Slide Switch
GND to Pin 1
EN to Pin 2