do you have user manual ?
if not, I can email you the adobe version
it says every thing.
but I am afraid, you wont be able find these things locally.
if you disconnect battery terminals and then reconnect them.
and then first time when you turn your car in reverse gear, you will see the reverse parking assistance screen for about 1 to 2 seconds and then it senses that the sensors are missing. and then it never shows up again.
to see it you need to reset the HU
I have CIVIC and I learnt all these things from it.