Vauxhall Vectra paper clip test

Hi,
I have heard that there is paper clip method for finding fault codes,

i read that the engine managment connection is under the hand brake lever,you can see it under the plastic cover, i have looked there but i can only see two sets of wiring and connecting plugs

Does any one know about this subject, where else would the connection be in the car.

Will it work on my face lift version of the vectra

Thanks