This was mentioned early in the tool development, but was not kept. Now Claire mentioned it again, and it seems it is important for her purposes.
So, it would be great if there could be a radio button or something similar for every money connection, with the options Grant and Loan. It should be visible only in the Properties window.
I know that this is a bit sudden, but I assume it does not require much work, and if that's true, it would be nice to add it :). If it is complicated, just leave it as it is for now.