HELP PLEASE!!!!!!!!!!!!!!!!!

My 2010 Mazda 3 2.2 sport vehicle purchased new in England has twice had the DPF reset by Mazda (OUCH!) due to servicing parameter function activating the DPF system warning light.
Research on the site gave a solution, a simple operation carried out by earthing the system and depressing the accelerator a number of times which reset the system warning light.
Unfortunately the photograph showing the diagnostic pin to use in the electrical system is different to my vehicle and am uncertain where to locate the pin on my vehicle.
Can you assist me in identifying where the diagnostic link is situated on my vehicle enabling me to reset the DPF system myself after servicing.

I now reside in France and have re-registered the vehicle, the nearest agent is 70km away and wishes to charge 100euro for a reset.
Hoping for a good result!