The screws don’t line up with the holes on the corner kit
Hey @Johnnyos! Did this corner kit come in the box with your Doorbell model? If so, the holes should certainly line up. This picture looks to show a No Drill Mount, in which we recommend you install the No-Drill Mount first and make sure it is firmly attached before installing the wedge kit, corner kit, or doorbell.
If the above information does not match your hardware, or doesn’t help with the fitting, please give our support team a call at one of the numbers available here. We’re taking additional steps to protect our team and help reduce the spread of COVID-19, so this has resulted in longer than normal wait times. If you are outside of the US, please read our response to COVID-19 here to see how to contact support. Feel free to let us know how this goes!