In the views are not displayed in the widget attributes field Form add to cart I need to display the attributes of the widgets in the representations in the Form add to cart, at the moment I have shown only a choice of the number and Add to Cart button

Now this (is not right):


How do I need to make it (what you need):


In the second image I have in the base table of contents it is possible to select the field of Content: Product variations and in it there are all the necessary attributes to me colors and sizes.

In the first image I have a base table Search API prime field Commerce item: Form add to cart in does not display attributes such as color or size selection, I can not achieve that result as the second image I have of the field Content: Product variations, as it were, I did not connect the relationship, the entity does not have the right, there is a field Indexed, Commerce item and some of the fields Content.

This capability is necessary for me to make a quick order from the catalog.
Try to use instead Content: Product variations field Content: Rendered Node witn selected to render custom view mode like a "Product variation". 

In display custom view mode should be disable all fields, but Add to cart form keep enable.