My honda accord 1996 2.2 compressor has 2 connectors. I'm trying to buy a replacement part and all have only one connector. What idea why?

Original with two connectors:

Original compressor

 

That is the inlet and outlet of the compressor, so your replacement compressor has to have an inlet and outlet at the same location.

 

Are you looking for a replacement compressor or replacement hose fittings?

The 2 hoses are separate, but your photo doesn't really show a clear view of the 2 separate hose connections.

Maybe you need to transfer that manifold plate from your old compressor to the new one?

 

Looking at the service manual it does show 2 styles of a.c. compressor. One being "hadsys" the other "nippodenso". The hadsys one seems to fit the description given of only "one connector", with only one port on the top face. Perhaps you may have better luck by looking for a " nippondenso" style replacement. Which would match the two port on top face style.

 

There has to be 2 ports. Maybe not right next to each other. But the refrigerant has to come into the compressor and come out of the compressor.