A Closer Look
As I was pulling out the drive tray, I noticed that the pesky antenna wire had a bit of extra shielding on it, right where it might have rubbed into the metal leg it was wrapped around. Its the small details that matter, of course. The other antenna is way off in the front of the case, hidden just behind the front panel.
You do have to remove the heatsink's fan to access all of the screws that attach the heatsink to the board. I managed to get the ECS LIVA One all fully apart after dealing with roughly 19 screws. Screws that will all have to be put back so I can get to testing!