Wiring Diagram for sim racing Button Box - Project Guidance

This is somewhat of a cross post from SimHub. I hope that’s okay here as this is my first post and first time using an arduino. I recently purchased quite a few electronics from AliExpress to build a button box for my sim racing rig but I am having a hard time, however, making sense of the wiring. The button box I'm trying to build is based on this one and will have 15 2-post buttons, 1 NO/NC/C button, 7 2-way 3-post toggle switches and 7 rotary encoders that have CLK, DT, SW, + and GND pins. I

32 Function Button Box Guide – AMSTUDIO

Make Your Own DIY Button Box In These 8 Simple Steps!

Knob Box - Home Cockpit Builders - Microsoft Flight Simulator Forums

DIY Sim Racing Button Box: Your Guide to Building One

first attempt at building a button box. think I need to improve the button symmetry but overall I'm pretty pleased with the results : r/simracing

Custom Button Box for iRacing - Peripherals - InsideSimRacing Forums

Make Your Own DIY Button Box In These 8 Simple Steps!

Custom Button Box for iRacing - Peripherals - InsideSimRacing Forums

Make Your Own DIY Button Box In These 8 Simple Steps!

Knob Box - Home Cockpit Builders - Microsoft Flight Simulator Forums

What's the absolutely easiest way to build a simple button box?

Simracing Button Box Schematic Review : r/arduino

Stream Deck Button Box Build – AMSTUDIO