Setting source when clipping via clipboard

Hi Guys!

I’m playing around with DTTG and clipping and found no way of setting ‘source’ in metadata of a note.

Since it’s not creating the field when I copy&paste from say Safari on my iPhone, I’d like to get an option of manually copy&pasting URL into the note’s ‘source’ field. Is it possible or shall it be requested as a feature?

Thanks!