How do you add a building to the loot spawn table

The title asks it all. How can I add loot into buildings I have added to my map. I put up a little military training facility on my map using the 3D editor, but the MBG_Killhouses won't spawn loot.

I have asked a similar question before, but the issue was never resolved. I don't want to be annoying, but I'm hoping to get some help .

I don't know where to find the loot table to adjust it to a) add buildings to the list b) adjust the amount of loot that spawns (in general)

Thanks for your patients ;)