Like I said, it is that way by default. You can ONLY put resources in a TC. If you don't want a specific resource going in the TC then you must block it in this list of the config file: Resources Not Moved To Cupboards
Either file. Base Loot is set to always spawn. Difficulty Loot is set to randomly spawn. So if you want it to always spawn then you would remove it from Difficulty Loot, otherwise you would remove it from Base Loot.
The documentation explains all of this already. You need to read it so you can better understand how the plugin works.