[TenTec] Argonaut II Question?

[Steve Berg]

I am looking into hooking up my venerable Argonaut II to my computer 
logging program.  I know it emulates an Icom, but need to know what sort 
of connector to get for the adapter.  I pulled the cover and looked in 
there, but cannot see if it is a mono or stereo 1/8 inch phone jack.  
Does anyone here know what sort of plug I am going to need to do this?

Thanks!

Steve WA9JML