Waitlisted - Should I write and send the optional supplement?

So I never got around to writing the optional ‘Why Grinnell’ supplement. I was honestly quite swamped and I made this mishap (very stupid) with their reminder emails and I really regret it. But anyways, I was wondering whether if I write it and send it in now it would help my chances. If so, any suggestions on how I should frame the email? I know using an excuse does not look good. Thanks in advance.

I think the best thing would be to tell them you’re very happy that your application will be considered again, that you’d attend if extended an offer of admission and then tell them about your interest in Grinnell (why you think it’s a good fit for you) and any updates (upward trend in grades, new accomplishments, etc). Don’t mention anything regarding the supplement. Good luck!

Thanks a lot!