Where do you plug the adapter in your Porsche? Share this with friends: The so called OBD adapters are plugged into the OBD port, which is almost always situated under the steering wheel. This is a picture of an OBD port in a Porsche. Related Articles What future functions will Carly for Porsche provide? When will Carly for Porsche Car Check be available for iPhone/iPad? Background story of Carly for Porsche Car Check / How we lost more than 10-thousand Euros? You would like to know more about mechanical over revs and the other data, that the Porsche Car Check reads out? You would like to be informed about the current projects of Carly for Porsche? You would like to be informed about the beta-phases of Carly for Porsche?