Installing Outside Water Spigot. DIY

My house didn't have an outside water spigot so I decided to put one in. The most important part in installing one of these is to make sure to have the slope so water will drain out of the spigot so it doesn't freeze in cold temps.

https://www.amazon.com/Sillcock-Chrome-Plated-Brass-Connection/dp/B00MA9FH3Y?dchild=1&keywords=frost+free+water+spigot&qid=1621310684&sr=8-3&linkCode=ll1&tag=agiftedcurse-20&linkId=79b0ff625686d4f6c6744ca6aca0c2af&language=en_US&ref_=as_li_ss_tl