You will need bridge J1 on the back of the ecu.
Add the 74hc373 SMD chip with the circle notch facing the inside of the ecu.
Also desolder & install the 28 pin eprom chip socket & chip.
Make sure to face the half moon notch on the chip towards the ecu plug side of the ecu.
NOT REQUIRED: For Datalogging J4 on front.& Solder in a 4 pin header supplied.