Please reach out to me on Discord hata#2881 hata_ or email 4panel@kusa.moe.
You can join the Rhythm Game Cabs Discord and locate the cabwiki thread in #general.
Check the ever growing todo page.
See also this guide for wiki.js markdown syntax.
If you would like to submit files or images to be archived here please send them to me and I will add them to public archive. You may submit literally any relevant files. As of writing, a public archive is not yet up, but should be soon.
If you need a place to upload files and don't want to use public file hosts please contact me for access to my private selfhosted filesharing service located at https://i.nyamo.xyz.