the remainder of the drip tray is indeed on the cover part you've removed.So I have inspected the pollen filter area again, and upon removing the pollen filter it's dripping wet, in the top right corner, (the corner closest to the passenger door). So tracing how the water would run in, I noticed this area that looks like something is missing, the guttering ends at the first arrow, so water is dripping down on to the catch tray, is this correct or am I missing a bit of plastic guttering the screws into the bottom hole (2nd arrow). Can anyone confirm this?
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that top tray is a pain too fit and you never think its in right, always try to get my hand in the back too make sure and remember to clip that front diverter back in done that a few times lol, I've also replaced the front expanding plastic pins on the cowl panel holding it..That drip tray is in the right place but it can come loose and become disconnected at the opposite end. Try removing and refitting.
I changed the pollen filter back in the autumn and it started leaking. Had to refit it all three times until it stopped, and I still don't quite know I did wrong.