New to all of this Thread

I am sorry to be asking this because for many of you it is like adding and subtracting in Kindergarten lol. But I cannot figure out how to add the Mods to Sudden Strike 3. I know that some games you have to manually put the file into the Mods File for the Game and others automatically just do it on their own. So please, any help would be so much appreciated. I tried to download a Mod and then start the game without finding it and then tried it the other way of placing the File into the Mods File of SS3. Thank you