www dot impco dot ws/spectrum-test-tools dot asp
remove the "dot"s and replace with real "." and remove the white-spaces, add your own http and :// if you need to.
it has links to the software, and diagrams of the connectors.
your machine has it's connector on the part of the harness that runs over the bell housing, on the operators right hand side, about where the operators right heel would sit but under the floor pan, look for a 4 wire connector that has what looks like 1 wire looped back into itself. that is the cap for the diagnostic plug.