The power wires must be wired via the shortest route possible to the battery positive terminal. The main power to the ECU must be connected to the battery and NOT the ignition switch, the ignition switch will not be able to handle the current required to operate the ECU (there is an additional pink wire within the Elite series loom that connects to the ignition switch to switch the ECU on).
Three Positive Cables need to be connected to the battery from the loom ( 1 x 2mm Red/Green , 1 x 2mm Red , 1 x 0.5mm Red/White ).