upload image field on manage category>>edit category

I am using Scott’s category image plugin
https://www.coffee2code.com/archives/2004/06/27/plugin-category-images/

and it works great but i need a simple upload field just to upload the image to the right directory the plugin will do the rest. Prefferably it would be on manage “category>>edit category” page.

this would be for wp-admin/categories.php