How to add image in cart background

How to add header image in card and for registration page. I have option of only changing colours of header and also tells to upload 0 pixel height image. i can’t change its image. Plz anyone help how to put image infornt of black colour background.
Google Photos
Sir, when i edit my page,i can edit only cart headings and rest shows woocommerce short cut.
Sir i want to change that black colour into some background images.