Looks good, Barry. Just one comment:
Connecting DCS to both TMCC and Legacy Command Bases
If the DCS TIU is connected to both the Legacy Command Base and also the TMCC Command Base or the Base-1L Command Base, the MTH cable used is MTH item #50-1007 TIU/TMCC 6’ Connector Ca- ble or MTH item #50-1032 TIU/TMCC-Legacy 6’ Connector Cable, and the Legacy-supplied “Y” cable is also required. The following diagram illustrates how the DCS TIU is connected to a Legacy Command Base, and also a TMCC Command Base or a Base-1L Command Base.
You're correct as far as connecting a TMCC Command base as shown. But one should never connect Base-1L to the Legacy base as shown in the diagram. Connecting a Base-1L to the Legacy base won't work, is not supported and even if it did work, would add no additional functionality.
Otherwise, thanks for sharing this valuable resource.