Develop Snap-On Board For Easy Connections - Rabbit SBC
It looks like the receptacles are in parallel with the Molex connectors. 
Is that true? Also it looks like the receptacles are top and bottom
entry. 

If those are bottom entry then you could build a single interface
board that the Rabbit will plug into. The board would have long-pin
headers to interface to the Rabbit and screw terminals for your wires.
The interface board would also make replacing the Rabbit easier.

Are you sure Rabbit doesn't sell an accessory like this?
If you could purchase the board without the Molex connectors
you could probably solder on screw terminals.