You have added the information block to the device type, refer to Adding information blocks.
Proceed as follows
Click the Edit button to add hyperlinks.
→ The Properties dialog is displayed.
Click the + Add Hyperlink button.
→ A new line is added.
Enter a Name.
Enter a URL.
The URL field may also hold a file link. However, as opening a file link is considered a potential security risk, it is restricted by modern web clients.
In order to open such a link from the widget later on, you can copy it from the dialog which appears when the link is clicked, and then paste it into your file explorer.
Make sure that the link is trustable and correct before using it.
If necessary, repeat the steps 2 to 4 to add another hyperlink.
Click the Save button to add the hyperlinks.
→ The hyperlinks have been added.
To remove a hyperlink, click the Edit button and then the Remove detail icon in the line of the hyperlink. To save your changes, click the Save button.