Cool. Thanks. In my case it’s 1 car & 1 phone, so that may be a different class of service.
As a general matter Sirius is famous for scammy pricing. IOW, it’s $25/mo unless you complain in which case it’s $15 and if you threaten to cancel it’s $10. If you actually want Sirius directly in the car (which it sounds like you probably don’t), a 10 minute call to customer service might make that happen at no cost.