Bosch dishwasher

I am installing a new Bosch SMU4HTS01A built under dushwasher.

I have 2 questions.


What is the function of the metal strip about 500mm long x 60mm wide the tell you to fasten to the underside of the benchtop. I have fitted it but have no idea of its function.


The mechanical linked child proof lock. Does it have to be fitted for the machine to operate.

The supplied Bosch instructions are appalling.