Where does this connection go to and how do I access it?

[volnole]

im replacing my rear bumper wiring harness and I can’t figure out how to get access to this connection to swap it out. I looks like it goes behind the license plate. Any thoughts??

 

[Kilroy]

Looks like a light plug of some sort, I have a Tungsten model so if it is connected to something I should be able to tell. Could be something they "planed" for but didn't use.

 

[brental1]

Don't completely understand your question; but I think that's the passive antenna connector. On my harness both the license plate light connectors are black.