Key Transponder ECU

[Jamcal]

Can anyone tell me where the key transponder ECU would be located on a Corolla Verso 1.8vvti?

It packed in during the snow we had in the winter but started to work again this week.

A few weeks ago I discovered water in the passenger footwell and traced it to a leak from the top left corner of the windscreen which was running down the inside of the trim on the A post, then dripping down behind the dashboard and pooling in the footwell. I've sealed the leak (hopefully) and had a good look behind the glove box to see exactly where the water has gone and it has clearly been on some of the electricals including the fuse panel but I could not see/identify the transponder ECU. I'm guessing the warm weather over the last week has dried things out and maybe this is why the transponder is working again but I'd like to have a look at the ECU to verify if water ingress is the cause of the problem.