The diagram in the parts section in Vadis is not very good....very small so when you blow it up you can't see much. But the sensor itself is screwed down in an area that appears to be in front of the intake manifold on the driver's side. The diagram looks like it's sort of triangular in shape with the screw in the unused corner section of the triangular harness. The part that an electrical connector plugs into on the harness faces that screw.

I just went out and looked at my car and the only thing with a connector with wires going to it is some sort of sensor that is slightly under and in front of the throttle hose (from the intercooler). It is turned around so it's difficult to get confirmation as to whether it's the same part as above. You'll have to take the trottle cover off to get in to where you can even see it very well. To get to it you'll have to most likely take the intercooler to throttle hose off.

Hope this helps. Sorry that I mistook a MAP for a MAF.
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1998 S70 T5 Emarald Green Metallic, 2004 V70 2.5T Ruby Red, Previous Owner of Black '94 850 Turbo Wagon. My cars have been running so well lately they've got me worried.