Park distance control retro fit


New Member
Hello all, new to posting so please excuse errors and any apparent stupidity. Am retro fitting rear bumper with sensors to a 2002 Spyder. I have the wiring loom in the rear of the bumper and this connects nicely to the ecu I purchased which I have located behind the drivers side rear light unit and this also plugs into the main loom. Putting in reverse reveals sensors are working but there is no beeping, I think I need the buzzer and that appears to be near the roll bar hoops looking at pictures. Can anyone shed any light on how to access this area, and is there another plug in the loom for the buzzer please? Many thanks.