[Elecraft] PC generated CW & K2

[n0jrn]

I read somewhere that there is a schematic on the Elecraft web showing how 
to rig up a keying line so I can send CW from my PC.

The KIO2  manual hits on the topic a bit but isn't specific.

I'm not finding the schematic on the Elecraft web.  Can anyone point me in 
the right direction???           OR

tell me how to rig this up ???

I would like to keep my paddles hooked up at the same time.

Thanks and 73

Jerry             N0JRN