Range rover l322 td6 2006

I have a range rover l322 2006 model the problem is my front parking sensors don't work tested the sensors all ok carried out a homes test from sensor to module all ok now the rear are working fine so decided to check the front buzzer there isn't one my first thought was that the previous owner may have removed it but no there is no connector hanging anywhere so my question is where does the come from them eny help much appreciated

Hello and welcome
best to remove your post code a general area is ok
and ask tech questions over in the range rover section of the forum

https://www.landyzone.co.uk/forum/range-rover.10/

Welcome to the forum