help getting parking sensors working on C8

[r8zer]

Hi

Im trying to fit OEM parking sensors on my C8

I have the parking ECU and at the back I have 1 blue plug and 1 18 pin black plug this fits the ECU do not know what blue plug does.

Have trying getting it to work through lexia but must be going wrong some where can anyone help.

Many Thanks

and yes im a newbie here so Hello everyone aswell.