MailChimp Integration

Hello,
i’m working with Mailchimp for WordPress plugin and i have to add a mandatory checkbox for groupings subscriptions.
The problem is that i have to differ value from name and from label in order to subscribe users to MailChimp Group.

For example:
[checkbox* mc4wp-INTERESTS “A” “B” “C” “D”] sets:
label to A, B, C, D
name to mc4wp-INTERESTS[]
value to A, B, C, D

This does not work!

Instead i have to set fields like this:
label to A, B, C, D
name to mc4wp-INTERESTS[group_id]
value to the names of the singular groups in MailChimp

Thanks for your support!