The ground connections are sometimes tied together at the docking sleeve. Is there any way to indicate which ones are tied (or can you tell by looking)?

The ones that are tied together are pin 10 (headlight sense and serial pin 8) and pin 11 (tel mute and serial pin 1). These don't make sense at all. I also don't see any +12V power going to the serial connector. The manual says that there's 12V on serial pin 4, but there's nothing connected to mine. Am I missing something, or is my connector wired wrongly?

Thanks,
Borislav