I bought the following brake pad kit
I expected the kit comes with all the hardware,
However, the kit is missing the highlighted part in the following diagram:
I found about the missing part at the middle of the installtion. The older part was so badly rusted and damaged so I just put everything together without the highlighted part.
Question 1: Is that part actually important?
Question 2: If it is important why it is missing from such premium kit? If it comes with many pad related installation hardware, why the highlighted part should be missing?
Question 3: Is it so important that I need to buy one and install it? The installed pads seem to be working well.