I had to replace my battery recently and I saw a couple posts here noting that there is an extension screw hole in the tray... some were wondering where H7 battery will fit. After measuring, I figured it will fit and purchased one from Costco - it fits indeed! Since the price was exactly the same as for H6 I figured I will get the bigger size... bigger is better, always, right. I set it up via OBD11 using the instructions on this forum.

Lastly, if Costco asks what car the battery is for - 2019 Ram V8 uses H7.

Hope this helps the searching souls