I ve acquired one of thise diesel tuning boxes that you plug into the common rail pressue sensor. I know that remapping is the better way but i was going to try the box to see what an increase feels like.

However i have a TDV8 and for the life of me i cant find the correct plug to disconnect.

Alledgedly it's a half hour job but i aint technically minded at all. So any help diagrams etc is much appreciated

Its right at the back of the engine bay in the middle.
Its a pain to get to, and you nearly get your hand caught.. Not that i had one in mine, just something i heard.
Not really worth the bother, doesn't make much difference to the performance, but depends what box you have?