Here’s one installed, and the photo below is what it looks like inside the wall. They do stick inside the building by about 2?. (I’m using closed cell foam on this house to get an air seal from the box to the wires.)
Next it’s time to flash them with the correct flashing tape. I’m using Cosella Dorkin here so this is their flashing tape. Now I can either caulk the box to the stucco or Not. I typically don’t caulk them.