Content creation

So, can anyone please tell me how I can customize the HTML markup for the fill-in-the-blank plugin?

I'm using H5P for the first time and I need some help please.

I would like to identify each textfield generated by the fill-in-the-blank plugin by adding a unique ID for each one. Right now, only the h5p-text-input class is available on all the textfields.
My plan is to use the ID in an ajax callback to retrieve selectable options for each textfield.

And ....

Is there a way to import a slide from an H5P project into another one?

Thanks

How do I fix this?

Thanks,

Gijs