It looks like your radar detector cord has additional wires other than ground and switched 12v which u will not use.
The Porsche connector in the roof only had 3 connectors identified in my diagram
Green is switched 12v
Black is ground
Red is constant 12v
The only wires u need from the eBay connector are
yellow which u connect to your white which will be ground
Blue which u connect to your red which will be switched 12v
Based on the labels I see in the pic