Using Slide Box as a form element

I’m developing a little app that will, as one of it’s main “Create an Object” screens, use 3 slide boxes to allow the user to pick a combination of items before clicking a submit button to create their object.

Only trouble is, I can’t find a way of using the slide box like a form field. By that I mean that while I have a listener for slides changing, I don’t see any obvious way to extract any more information other than the slide index.

To further complicate matters, even once I figure that out, some slides will have radio buttons on which I will also need to query to complete the object creation process.

Anyone else ran into this and come up with a suitable solution?