Chris,
To program the FT-2800, I use this:
G4HFQ Software - FTB2800 Details
The cable you posted is to program a FT-7800/FT8800, not a FT-2800.
The FT-2800 is programed by removing the mic and connecting a cable in it's place. The cable on your post has different connectors.
Regards
Alvaro