My daughter has this barking and walking hell (dog). If you are so lucky to own one, you have the right to question me " Why the hell did you fix this? "
Yep, but she loves it.

So this is a battery cover for this particular dog (see pics). The original cover broke at the screw hole and it became flimsy. When I designed, I followed the original design but from the uploaded models I removed the 4 - 4 small holes from the mounting plates and the 4 - 4 pins from the cover. These pins should help to fix them together but these were so small and weak they just broke off. When I tried to wider them it interfered with the outer walls in Cura and resulted pour quality. So I decided to remove them and I just put two other wider holes and pins on the larger mounting plate side.

I also reused the contact springs and screw.