LMM Location: Where is the LMM?

'I got the Speedbuster BOX (1 poti version) at a good price today, but I think a part of the installation instructions is missing. Where is the MAF sensor supposed to be? There's a connector behind the air filter that looks like the one in the instructions, but pin 4 is empty on mine, while the instructions say it should be occupied. I don't want to connect anything incorrectly and damage the box. The car is a Seat Ibiza GT TDI 110 HP, year 99, so it's pre-facelift.'

Can anyone give me a tip? I really want to try this thing out. *gg*

Between the intake manifold and the turbocharger, and near the air filter.

Best regards, Rainer.