If you're using custom placement for triggers, you will need to manually install back-in-stock widget. Here's a simple guide to help you install back-in-stock widget on BigCommerce product page.
From overview page, click
Show Code to get widget snippet. Snippet should look something like this:
Next, edit BigCommerce theme and locate product view:
add-to-cart component. Then paste snippet after it.
Need help installing?
If you need additional help to install, you can contact us.