[Kenwood] TS-930S Question

[Rick Markey]

I just "inherited" a Kenwood TS-930S which seems to work just fine. 
Someone replaced the meter lamps with blue LEDs which is a nice touch. 

However there is a cable that has been added that hangs out the back of
the radio.  It has a DB9 connector and three wires are connected. 
Presumably this is an aftermarket RS-232 connection?  The wire runs
underneath the speaker and I have not taken the radio apart to see where
it is connected. 

Just wondered if anyone on the list had seen this and might have a clue
as to what it is?  There was no documentation with the radio other than
a copy of the manual, so I have no idea what modifications may have been
made to it. 

Thanks, 

Rick, KN3C