I have am replacing a thermostat. Out of the wall, there is a red and white wire. I am not sure what to connect it to on the new thermostat.

I am not sure if I insert the wires in the top or front, then tighten the screw?

Here are some pic's. http://i68.photobucket.com/albums/i3...s/DSC00861.jpg and http://i68.photobucket.com/albums/i3...s/DSC00866.jpg and http://i68.photobucket.com/albums/i3...s/DSC00867.jpg and here is a picture of the directions http://i68.photobucket.com/albums/i3...s/DSC00868.jpg