EHinPA

I am thinking about buying a dash cam for Insurance scammers etc. I'd like a duel front rear, but I'm worried the installer may not do a great job and mess up the electrical system. I may just get front only and plug it in when driving, but I'd lose out on parking lot security. Anyone have info on places like Best Buy for Installation? I have a brand new 2020 Rav4 Hybrid and dont want to mess anything up!