[Elecraft] Band Data output?

[dm4im]

Elecrafters,
i control a 6*2 switch via a remoteqth.com Band Decoder II using RS-232 
sniffing mode. Not happy with that. I like to switch to Band Data output 
from the 15-pin sub-D ACC connector, but am a bit confused.
The band decoder manual shows connections labeled BCD-1 through BCD-4.
The K3 manual labels it's outputs Band0 OUT through BAND3 OUT.
What goes where?
Thanks.

Martin, DM4IM