Due to people constantly trying to mess with my cars in my driveway, I purchased a Ring floodlight camera. I know it has to be hardwired but I really do not want to run a new circuit if at all possible. The light will attach to the wall above my garage door and there is an existing electric run above my garage that goes to the outlet for my garage door opener plug. What I wanted to do is splice into the romex going to the outlet and run a line to the exterior wall for the floodlight. I read up on it and it seems all I have to do is make sure there is enough slack to cut the line, attach matching wires with wire nuts and run a ground pigtail to the junction box that all the connections will be inside. Will this be the best way to accomplish what I want or is there a better way? I have done basic wiring before and ran circuits, but have never spliced into an existing run. Just trying to do it the easiest way possible.
TIA
TIA