How does Dynojet get connectors for their Power Commanders if that configuration is proprietary?
Are the pins you're trying to access in the ECU currently unused (unpopulated) in the OEM connector? If so, can an auxiliary harness be built that would essentially add a service connector to the stock harness using the OEM connector?
It was unclear from your posts if you're looking for the connector or just the pins. If you're looking for just the pins, K&L Supply sells terminal kits that contain several types of Japanese proprietary pins, which are also available in bulk once the right one is identified. See http://www.motorcyclecarbs.com/kl/catalog/2003/104.pdf for more information.
Give me a call today ***-***-**** Let me see if I can plug the pc3 into the interface plug..