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

A Few DIY Button Box Questions

Building a Button Box and can't quite figure out where I went wrong! - Project Guidance - Arduino Forum

Button box wiring sanity check - LEDs and Multiplexing - Arduino Forum

Smart Bus Solution Installation Guide - FootfallCam

Wiring solution - Project Guidance - Arduino Forum

Sim Racing Button Boxes: Prebuilt and DIY options

Sim Racing Button Box : 8 Steps - Instructables

GitHub - djpr1me/Button-Box: DIY button box for sim racing

Smart Bus Solution Installation Guide - FootfallCam

Superdrive - SV250 Racing steering wheel with pedals and gearshift paddles for nintendo Switch - Ps4 - xbox Seie X/S, Xbox One - PC : Video Games

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Smart Bus Solution Installation Guide - FootfallCam