How do I drop the "base tray" from integrated AEG 80860i ?

Hi;
I have a problem with the above noted model showing error code C3 & the 'anti flood' motor remaining on..

A comprehensive answer was supplied that took account of the fact that the dishwasher is an integrated unit as follows..
"you can also remove the metal plate across the front underneath the door and drop the plastic base and mop it out with a cloth which is easier based on the fact yours is integrated"
My problem now - is that, Having removed the kick type metal plate under the door, I cannot see how to 'drop' the plastic base in order to drain it..