[Elecraft] how to run KAT100 and control software - re. two control cables

[Brian Pepperdine]

OK. Honestly I have searched the mail list archives and manuals...and cannot 
find the answer....

I have a K2 with 100 w PA (so that serves in place of K102 i/w aux bus), and 
the KAT100 tuner.  A cable runs from the K2 aux DB9 to the tuner.
Now, I want to run a cable from my computer to allow me to use the K2 Remote 
Software.
I have the cable.. but there is no place to put it!!
I assume I have to use some sort of DB9  connector.. but what sort and where 
do I plug that it in such that the KAT100 tuner and the computer are 
connected?
Does it go in the K2 aux socket and then cables go off to the KAT 100 and 
the computer? Or some other way that KAT100 and computer software signals 
are sent in a parallel fashion?

If any one would please outline this in some detail or point me to where 
this it explained I would really appreciate it. Someone else might too.. 
since I honestly don't see it anywhere.
But then again, my wife says I don't see things that are in plain sight.

Brien Pepperdine
Toronto
VE3VAW