Can someone tell me which wire the "convertor" wire is supposed to go to on an STi6. The instructions I have say "Locate the ecu and cut the 1st wire from the right, top row, r/h 22pin connector, Green/yellow wire. Insulate the loom end and connect the convertor wire to the connector end of this Green/yellow wire".

Having done this, the speedo doesn't work. I assume this is meant to go into the speed sensor wire, are the instructions correct?