Hello @kickstand284! Nice to meet you! =). You can use these images in your title room or even in your battlegrounds. RPG Makers MV and others versions have this configurations in Database / Battle Events in map :D. I hope that i could help you!
Thank you, i was so confused also it doesn't seem to work for the battlebacks so maybe I am missing something but I will definitely use them for title room. I just figured out why its cause the jpg is not png I just changed it to png and resized it. Thank you for the help.