As Joe said, it's pretty easy if you have the Instructions. BUT, before you go unscrewing anything, 'rig' your wiring 'strand' that comes out the wall somehow so it doesn't accidentally fall BACK into the hole and you'll have to either 'fish' for it or make a bigger hole to get at it! Assuming the hole in the wall is slightly larger than the wire-bundle, I've used a small hose-clamp like the ones that you SCREW your hot water heater hoses in your car. DOn't use the clamps that you 'pinch' to open. The ones that you screw down can be screwed down to the 'size' you need to prevent the wires from falling back in the hole. ONce the wires are re-connected, go ahead and take the clamp off.