Boundingbox not showing with custom JSON

Hello,

We are using a bit of customizating in our website to be able to use custom images and more information. This means we are creating our own JSON for PFD.

We want to use boundingboxes but are unable to get this to work. For some reason its not showing at all. Maybe we are missing something in our JSON but looking at the available information online we can not figure out what it is.

I have added 2 files to show what we did (we also tried multiple other things). Hopefuly something knows what we are missing.