My car has those too...I noticed them when I was installing my alarm. There are also some other plugs that don't go to anything too. I looked in my wiring diagrams and here's what I found:
Green Connectors (B75 & B76): Test mode connector. I believe you connect this when you are doing diagnostic tests. When connected, the CEL will flash at a rate of 3 Hz.
I'm not sure what the other connectors in that area are for, but here is what I found:
Black Connector (B82): Diagnosis connector
Other Connector (B250): Flash memory connector