So I've installed and hooked up my cams and they work great. But it's all just installed externally. I now want to take it into to a place (like Best Buy) and have them pull the headliner, panels, etc and hide the wires/hook up to the fuse box. Should I purchase the hard wire kit from Viofos site and bring it in to them or just let them use theirs? No clue what they charge. I have the A129 Duo.