spliced mine as i too could not find the PDC speaker and when all pluged in the sensors wouls not sound off but as soon as i added the spliced in wiring and speaker i can hear the sensors working
this plug fits into the bumper wiring for the sensors
While inside the boot area the white clips fits into the parking aid ywc 105 180
And the black clips also fits into the same box you must make sure the cam is flat down otherwise the clips will not fit in properly
Double sided tape ready for fitting back against the rear wing panel
After fitting i had no sound and could not find the speaker under the rear parcel shelf i relised that it used the IPK
sounder but i still got no sound so i fitted and spliced in a speaker works great
Hope this helps in some way Arctic.