If you're looking to install a wall mounted faucet, there are a few things you'll need to do to rough it in. First, you'll need to find the studs in the wall where the faucet will be mounted. Once you've found the studs, you'll need to mark their location on the wall so you know where to drill.
Next, you'll need to drill a hole in the wall for the water lines. The size of the hole will depend on the size of the water lines you're using. Once the hole is drilled, you'll need to run the water lines through it.
Finally, you'll need to connect the water lines to the faucet. Once everything is connected, you can turn on the water and test the faucet to make sure it's working properly.