Hilitand 16 Channels Relay Module 12V for PLC Amplifier Board DIN Rail Installation

all right this is a video review in tutorial for a same smart 16 channel 12 volt relay board I found this on Amazon and I'm using it for Christmas light project using Arduino actually my Arduino mega right there but the review is on the relay board there's been some confusion on how its use and really an amazing board it works really well just got to figure out kind of how it works there's really no instructions for it so first things first I have a standard 12 volt if you can see it power adapter and that just goes right on the wall and the right here you'll notice the cable I just cut off the end of it and that's all right there is gonna be your ground it's just a straight black wire that said right there is your power and it is going to be a leader a black wire with a light with a white lining or a black wire with a set of stripes and right there you have two ground wires right at th