Adding my SSL certificate to the footer

Hi,

I have just purchased my SSL certificate and would like to add it to the footer of my site. Go Daddy give me these short instructions on their site:

‘Choose your seal, copy the code, and paste it in your site footer.’ but I cant see where I can do this.
I have the WordPress Rosemary theme and have looked at:

1. Appearance -> Widgets-> Custom HTML but the options after that are only Side Bar and Instagram Footer
2. Appearance-> Customise-> Footer Settings but this sections asks for text, not code or an image

I’ve seen other people have posted a similar question on forums but since they’re over 1 year old I’d like to ask again.

Thank you!

The page I need help with: [log in to see the link]