SSL + Subdomain multisite + Domain mapping = ?

I've gone through the forums, especially this post (https://premium.wpmudev.org/forums/topic/multi-site-domain-mapping-and-ssl) and still am clueless.

WordPress subdomain Multisite 3.7
Knownhost VPS (already asked them, they said it's outside their scope)
cPanel/WHM with wildcard subdomains
WooCommerce
Domain Mapping

I have SSL working fine on the primary URL for my install.

Now I need SSL (for Stripe) for a sub-site on the network.

I have purchased SSL certificates for the new domain.

I'm just not sure how to get it all working, especially with domain mapping. Anyone done this successfully that could help step me through the process of getting a sub-site setup with SSL?