My second link was outside spending - independent expenditures, meaning political spending outside of the candidates and parties. I know two is a hard number for you to handle, but surely someone there could help you get that far . . .
Independent expenditures are only a part of outside spending by groups that pop up like stinkhorns every cycle & disappear just as quickly. They sponsor all those "issue ads" as explained in my link, the one you obviously didn't read. Done well, the source of funding is totally obscured by their tax-exempt status, and their sheer numbers make them very difficult to even account for.
You knew that already, of course, which is why you exclude them in your "analysis", which is obviously just a rework of something from Newsmax or similar.
How many pro- Dem issue ads have you ever seen, anyway?