License question with multiple VINs

[darmok]

We have a two-Volvo garage (C40 Twin and XC40 B5) and I'd like to know how the OrBit licensing works with that. Do I just buy two separate subscriptions, one per car? There's nothing in the PayPal process that asks for the VIN, so how is each subscription associated with the VIN? Can I use the same installation on one computer with both cars, or does the install become locked to the VIN?

Thanks in advance for anything that can help clear this up!