Redirect all wp-login.php files to root file

I'm needing to redirect all primarysite.com/[subsites]/wp-login.php pages to my SSL secured file https://primarysite.com/wp-login.php page.

I think I'm close if I can just find the wildcard variable for "subsite" below.
RedirectMatch 301 ^/subsite/wp-login.php$ https://sites.berry.edu/wp-login.php

Any advice would be greatly appreciated!