Dolphin Audio in silver fitted to a Honda Civic. Masking tape is used to accurately identify the drilling location and it helps hold the drill bit in place when drilling and protect the paintwork. Ideally you want to mount them 50cm off the ground, you can get away with less but may need to use the wedges included in the kit to angle the sensors up slightly if you start mounting at 40cm or less.
The bumper has been drilled in situ but them removed to feed the cabling through to the boot where you can see a hole has been drilled and gromit fitted to pass the cabling through, you can alternatively use some silicone sealant. Power lead has been soldered onto the reverse light feed but a connector block is a more common solution.