**Update**As requested, I'm posting some better closeup pictures of the coax soldering. Hopefully they help.
Yes, it is FREAKING small coax (about 1.2mm diameter). There is a small amount of insulator between the coax soldered down and the trace. The pad on the left of the signal trace is not connected. This is not for the faint of heart. A good soldering iron and a microscope can help.