How do you connect a second remote control to xbox 360?

First you go to the top of the controller, right of the left trigger and left of the center of the controller. There is a small round button with a thing that look's like the signal strength of a cell phone above it. Press and hold that till the center button lights start turning clockwise. Then Press the connect button on your xbox. It will then automatically connect the controller to that xbox. Repeat this process if you want to do this on another xbox