Parking sensors show on dash or radio?

Needed the paint code for my Fabia when finding replacement parts so went to the boot and lifted up the floor and found the full wiring loom for parking sensors, but no sensors plugged in.

I'm going to get the sensors and fit them in the Monte Carlo bumper that's currently fitted but just wanting to check what other people's do.

My girlfriends new golf show up on the radio with the distance etc but my older mk1 Fabia they just beep.

What will my 2008 Fabia 3 do when I wire them in?

Thanks