There are two ways to connect the box connection:
(a) Use the authorize method
1. Click on the Authorize button
2. It will redirect to the Box authorization page.
3. Fill in the Folder and Filename with your file name. eg, /test.csv
4. Choose the correct File Format.
(b) Use the Public File method
1. Enable the Public File options if your file or folder is not public and needs authorization.
2. Enter the URL in the Source URL field if it's publicly accessible and doesn't require credentials, https://app.box.com/index.php?xxxx
3. To get the URL link, right-click on the file and select Copy link address.
4. Choose the correct File Format.
For more information on box sharing, please refer to this documentation here.