URGENT: College waitlist letter advice

So I know this is last minute, but since the colleges say they don’t consider waitlist applicants until after May 1st, I’d figure I’d wait to see how I did at DECA ICDC that just got ended yesterday so that I could have some significant updates for them. I placed in the top 20 internationally in Business Finance, and I based a lot of my application off of this club so I wanted to update the schools I’ve been waitlisted at.

I was waitlisted at Harvard, Dartmouth, and Claremont McKenna and would be happy going to any of these schools if taken off the waitlist. Who should I be sending these letters too? I know for Harvard there’s a specific upload location, but for Dartmouth and CMC should I track down my regional admissions officer’s email and just send it to them?

Any general advice on how to write these letters would also be greatly appreciated.

Where did you get into that you have accepted?
I think with Waitlist it is best if you pick one that you like the best and tell them you would attend if they accept you.

Yep, do that.