I just got the RT110B and am trying to hook it up (heat only) but I can't figure out how to attach the wires. I know which one goes where, but how do I actually connect them to the device. Do the little screws come out? What do you use to get them open? The manual doesn't say. The picture shows the wires coming up from the bottom but there is no opening.

The screws should just loosen, and the wire goes under the screw.

DITTO.
Sometimes it's a pain getting the wires in under the screws, but you'll get the hang of it.
It's even harder if there's a factory jumper installed.:(