No, these mods DO NOT go in the mods folder, they are set up to go where they belong. DO NOT copy and paste them all at once, look into each one and place it where you find a matching folder outside of the optional mods folder. Most go into BepInEx, but there are some with folders that match a different folder. The first folder inside each folder with the mod name, at least the first one that isn't named the same as the mod name, is the folder that matches one outside the optional mods folder. The optional sideloader modpack folder and the optional mods folder are two very different things, the optional sideloader modpack files DO go into the mods folder.