If you haven’t seen the information on how I set it up initially, check out the first post here: http://blog.anthonyngu.com/2016/12/12/bridging-the-gap-between-nest-and-line-voltage-thermostats/
This is how it was left hanging for about a week before I bought an electrical box at a nearby Home Depot that would fit next to my original electrical box so I could begin mounting it. Steps for the finishing touches were as follows:
- Cut out a bigger hole in my drywall (making sure that it was still small enough to fit under the included mounting plate)
- Mount the transformer/relay next to the original electrical box. (Something to keep in mind: Double check to see if your original electrical box is bigger than its opening. If it does, you will most likely not be able to place another box right next to it without have to do some patching of the drywall after)
- Paint over any small marks or discrepancies with the mounting so that it would look as good as new!
The bigger hole was still small enough for the face plate to cover (included with the Nest) and I was able to paint over the edges to make it look as good as new!