You can connect your BigCommerce account three different ways:

Option 1 - Adding Partial.ly from the BigCommerce app store

Option 2 - Adding Partial.ly from your BigCommerce admin

Option 3 - Connecting BigCommerce from your Partial.ly account

All will work just as well. Option 3 will require you to sign up for Partial.ly first.

Option 1

Go to the BigCommerce App Store and find the Partial.ly app. Click the "Get this app" button on the right side of the page. You'll then need to login with your BigCommerce credentials and authorize Partial.ly.
bigcommerce-app-store

Option 2

Login to your BigCommerce admin then click on Apps in the main menu. Search for Partial.ly then click on the Partial.ly app result. Click install on the Partial.ly app page, then click the checkbox and click the Confirm button on the next page.
app-install

Option 3

Sign up for a Partial.ly account at https://partial.ly. From the Partial.ly merchant portal, click Settings then integrations. In the BigCommerce section, click the Connect BigCommerce account link. You'll be taken to a BigCommerce authorization page to authorize Partial.ly.
integrations-disconnected

After you've connected your BigCommerce account, you'll want to review the settings for the Partial.ly integration with your BigCommerce account. See our Selling with payment plans on your BigCommerce website for more details.