How to indentify the thermostat in a Baumatic BDW13 dishwasher?

I have traced the likely fault in my Baumatic BDW13 dishawasher to a failed thermostat.

I have seen the replacement part on various websites; it seems to have a bright (brass ?) metal fron to it, with electrical terminals.

However, I cannot identify the same component under the washer; all the parts there seem to be made of plastic, or a re plastic coated.

Where is this component situated in the space under the machine ?