How to select default product category "selected" in ProductCatalogInput widget?

Content

I am using this:

<rn:widget path="input/ProductCatalogInput" name="MyAsset.Product"  label_input=""/>

I want customers to see products in a particular category which will be pre-selected (category) instead of ask customer to select category and then products.

I want to set category default so they only have to select product.

How to do something like this?

<rn:widget path="input/ProductCatalogInput" name="MyAsset.Product"  label_input="" Default_Selected_Category="1234"/>

 

OR 

 

Can I do something like this?

<rn:widget path="input/ProductCategoryInput" Default_Selected_Category="1234" />

Version

CP3