two cams one hardwire

I currently have a Mini 0806 as my only dashcam, but I am looking to add another one out the back window of my car. However, there is no power source easily accessible in the back of my car and I want to limit splicing. Would it be possible to just put a Y adapter on the USB coming out by my...

I thought a new thread would be helpful to generate some more discussion on this topic. I've done a search but can't find much. I have fairly basic electronics knowledge so if you can contribute on this subject then it would also help others who may be asking the same question. The question is...