The FSM under Engine/CIS-E/Testing CIS-E components has in that document part numbers for special test equipment - and that includes testers which have such a connector attached.

Then a search on google usually yields a few of those gizmos on ebay. You could then chop off the connector or sounding like you are an electronics type, maybe cut the cable, add a new type connector between the test gizmo and the X11 connector, then also be able to reconnect it and use the test gizmo too!