Send BuddyPress Signup Fields to Mailchimp

Hi,

I’m using the BuddyPress integration for newsletter signups during the account creation process.

In addition to the EMAIL field I require a non-standard field which is COUNTRY.

The COUNTRY field already exists and is required in both Mailchimp and BuddyPress.

Now I’m looking for a way to connect the two.

I’ve found something very similar here:

Send WooCommerce fields to Mailchimp
https://www.mc4wp.com/kb/send-woocommerce-fields-mailchimp/

Do you happen to have a how-to guide for my scenario as well or would you be so kind and point me in right direction?

Thanks much!