Hi Warp,
Found the correct one. Here is what happened:
When I looked thru the opening when I removed the infill panel, I saw a cable with a blue tape wrapped around it. As I pulled the wiring as much as I could off the hole and could not find anything disconnected, I tracked the other cable down to the side panel and found it to be hanging unconnected. Did not even checked the connector - unwrapped the blue tape, passed it under the frame and then - oh oh...
After posting the picture I went back there with a flashlight and tried to pull the whole wiring off the hole covered by the infill panel again, as it seem to be stuck somewhere. Guess what was holding the cables to come out? The correct connector. It was stuck somewhere , that's why I thought it was connected and could not see anything disconnected anywhere inside.
I'm finishing installing it now and wrapped the other one back in the side panel. By the way, what is that connector in the picture for? Any ideas?
Thanks for the help.