a system for interconnecting the connectors of two or more electrical appliances , each preferably having two or more terminals , wherein the connectors and terminals may be of different physical configurations . the system includes one conductor for connection to each terminal of each appliance , a connector at one end of each conductor to mate with one of the terminals , a coupler connector at a second end of each conductor , and an interface module interconnecting the coupler connectors . the interface module comprises a connector enclosure in which interchangeable transfer circuit boards are carried . by replacing circuit boards , numerous types of different electrical interconnections can be made using only a few types of interconnect cables .