FYI, here's the complete "package" that will be included with the buffer. Obviously, the buffer box itself, then there's the 24V power supply, and the earth ground tap cable. That cable goes between the TMCC or Legacy base power brick and the base itself. The single wire is connected to the barrel of the base power supply which is the earth ground (3rd prong of the outlet). This is connected, obviously, to the earth ground terminal of the TMCC buffer.
Yes, there will be nicer looking labels, but I didn't have them yet, so I just taped on the connection data and the name. 
