[Amps] Need help with Hammond filament transformer.

[OTAKEBI at aol.com]

I am setting up a separate 6.3 VCT filament transformer for filament cur.  
from a power supply to a transmitter.
I have a Hammond transformer but I need an Elmer to tell me how to hook it  
up.
I don't have documentation but have to go by color codes on wires.
I can tell that the two wires that are black are the primary wires and  
should go to the 115 volt line to get power into the transformer.
Now on the secondary I have three wires.
A green wire, a green/yellow wire, and another green wire.
Which of those three wires should go to filament on the plug that goes to  
the transmitter and which should go to filament common and where does the  third 
wire go to?
Thanks for any help in advance.
Dan/N4VET