Step one in our build, trace out the holes you want to cut for the outlets. Using a dremal tool preferably, but a sharp razor will do with some force, cut a hole for the outlet. I didn't care about precision very much for this step, but you can get exact if you want.
Using some screws and nuts attach the outlet securely to the project box.
Next follow the same step with the power input outlet on the other side of the box.
Now connect the neutral(white) and ground(green or uncoated) wires directly from one outlet to the other minding polarity.
Next mount the relay with the 110V side facing the household plug outlet. Use some hot glue to hold it in place.
