Thanks t-tony. I think that is what I was looking for. The instructions that came with my code reader identify it as a Data Link Connector or DLC. My tablet has auto type for some words and abbreviations and I didn't notice that "typo". I did find it on my Z4. It's funny that my manual which came with the car doesn't include any information about it. Anyway, I connected my DLC to the port and it said that my car is "unsupported", so I will probably need to visit my mechanic. Thanks again for your reply.
Bill