Multiple Sonicwalls - SSL Wildcard Certificate

We have multiple sonicwalls spread through the country and need to get a SSL Certificate.

Question can we use a single wildcard certificate from a provider and use it for all the locations?

All the firewalls are pointed as FIREWALLLOCATIONS.DOMAINNAME.COM

I assume yes but wondering how the CSR/import works, can I just import the SSL from the provider or do I need to generate a CSR for each location but for FQDN use something like *.DOMAINNAME.COM ?

I haven't used a wildcard certificate for a sonicwall so this part is a bit new to me.