RS232 smart card reader, in keyboad, Compaq SK 3320

I bought this keyboard off eBay thinking I could use it with my security alarm project. then I realized I couldn't find anything online on how to interface the RS232 smart card reader with an Arduino. I have a Sparkfun level shifter for when I get the protocol working, right now I am just using the Arduino serial monitor to see what data it sends. so far, none. the smart card light blinks, but that is it.

Has anybody ever interfaced one of these? I can't seem to find anything useful online.

Thanks in advance for any help.