G20 ECU serial connection for DL1 data logger

[pie_boy69]

So the car I bought has a DL1 logger on it but has not been connected to the ecu, apparently there should be a serial output on the original Pectel/cosworth loom (there is no serial out on the ecu) does anyone know where I should look to ffind this andd is it a standard d shape serial port?

Thanks

Keith