Use r2modman (reccomended) or thunderstore mod manager
Why choose r2modman over thunderstore?
It has a cleaner UI, much faster, and has no ads
steps on r2modman
1)https://thunderstore.io/c/lethal-company/p/ebkr/r2modman/
2)manual download
3)install it
4) find LC Into the Darkness or my code for the modpack to import
TMM)
1) https://www.overwolf.com/oneapp/Thunderstore-Thunderstore_Mod_Manager
2) Same steps as r2modman