I have no idea how to make a scheme but what I turn on is the light with the remote control that is connected to the relay and the relay to the arduino
The light I already found information is to connect the relay with the switch as if they were 2 switches.
That is, the positive or phase according to the voltage used by another relay to the middle of the relay or switch to the middle of the other and to the positive of the LED or to the socket and the interconnected ends between relay and switch with each other.