1. Click on Shopping Cart…
2. Click on Order Pages
3. Find the Order Page you would like to link
You may only have one order page, this is not a problem! Just pick that order page. Also it is best practice to link your "Default" order page to your website.
4. Click the "eye" icon to open the Order Page in a new Tab
5. Copy the URL
In the Address bar copy the URL to this Order Page