repurpose

I am upgrading from Viofo A119 to a front+rear 2-ch camera, and I am wondering if I could repurpose A119 as an interior recording camera. Any ideas on how I go about this? I particular, where and how to mount it?

I just received this product as a gift One of the items that it comes with is an optional rear license plate mounted camera. The problem is it requires drilling a hole to mount, and getting into the wiring (optional) to get it to work as a back-up cam as well. I lease a 2014 Mercedes, so any...