Matt. It’ll be interesting to know how the installer actually fits - I’m still waiting for Porsche to provide the installation / cabling details for their camera - not sure if that is only on the Coupe or SUV as well.
I've so far opted to use a Blackvue camera with their rechargeable 12v battery pack. The battery plugs into the standard 12v socket in the boot (battery located in the storage well below the floor), so no interfering with anything that might be used to wriggle out of a warranty claim later.
Cabling is simply a feed from front to rear camera / front camera to battery / battery to 12v socket