Hi Pelleplutt,
Here is what you can do to identify the port with its corresponding MAC address.
Download and install the PROSet software in case you have not done this yet
https://downloadcenter.intel.com/SearchResult.aspx?lang=eng&ProdId=2248
Go to device manager->right click on the port of the network adapter
Click on property-> Link Speed-> Identify Adapter
Click on Start, please check on the physical port, it will blink continuously for you to identify
The corresponding mac address for the port is shown on the PROSet software so you will know which port the mac address belongs to
I hope the above information help.
rgds,
wb