Import data and populate source and url fields for an image?

Import data and populate source and url fields for an image?

I have an image field (set to link) in our db. Rather than adding records individually, we want to compile records throughout the day into an Excel file then use the import command. But, is there a way we can configure the data in the Excel file to automatically fill in the "source" and "url" fields in the image field? It has me stumped.