Using SSL on a Alias domain using Plesk

I want to use on an Alias domain, SSL. I'm using Plesk. 

I can use it for the primary domain but I can't on the Alias/secondary domain.

I'm aware that I can have a UCC SSL Certificate, that is a single certificate that validates multiples domains. But I already have the corresponding "one domain-one certificate" SSL certificates

Any way of doing it? 

Any workaround?


Thanks in advance!