Noob Saibot's Chest which costs 250 Hearts is on the top level of Goro's Dining Hall. I've Paused the Video so you can get a good look on the map.

Be sure to check out the rest at: Gamefaqs courtesy of MGO_FOXHOUNDED

https://gamefaqs.gamespot.com/boards/253573-mortal-kombat-11/77671303