First, Purchase the Website Wishlist Integration from you Integrations tab.

Next, select Squarespace as your platform.

From here, you can select which sales lead you want listed on your Wishlist projects.
Note: Please copy the Public Browser Key and ensure your Approved Domain matches your website. You can adjust that here if need be.

Then, from your Squarespace page, click Settings > Advanced > Code Injection

Copy and paste the snippets from this article.

Please ensure you've included the Public Browser Key in the Header.

Awesome!

Now, Add a 'Blank Page'.

Then, give the page a name.

After, edit the page and add a 'Code Block'.

Finally, copy and paste another snippet from the article above and you'll see your inventory post right away!