So I opened up the tablet using @oldturkey03 's suggested video and then also found [link|https://youtu.be/Oh3DCzVayIs?si=oBGg5eZpgh13v87B|this youtube video|new_window=true] that also helped in knowing where to apply focus for the heat gun to remove parts.
After opening the MobileStudio Pro, the inside desperately needed dusting and I unplugged and then plugged back in the battery. Now the battery has started to charge again. I still plan on replacing the battery, because I'm very sure that the issue is the battery, but this is a good temp fix till I get a new one in the mail.