Adding brand schema

Hello,
I have 2 questions related to adding brand property on a product page schema:

1- Is there a way to add any filter/code to the community plugin so we can include the brand property to a product? In this case the brand value would be static, always the same for the whole site.

2- On your Woocommerce SEO integration plugin, you allow to select (from a dropdown) an attribute for choosing brand, manufacturer and color.
Specifically for brand, how can we do to use a static value for the whole site instead of choosing an attribute from a dropdown?

Thanks!