Add custom field to Woocommerce add new attribute / edit page

Is there a way to add a custom field to the add new attribute page or edit attribute in Woocommerce ?

Preferably with CMB2, but whatever works.

As I understand, this specific section of woocommerce is a taxonomy inception – it’s a taxonomy that creates taxonomies 🙂

I looked under woocommerce/includes/class-wc-post-types.php but not sure what filter would do the trick (if any).

I’ve managed to add fields to the individual terms but I need a field for the attribute itself.