The factory IBC is located to the right of the steering wheel and down low on the dash. If you don't have the factory IBC, there will be a small opening there that will have a plastic storage space box. The IBC wiring plug is already there, attached to a dummy plug on the back of that box. You have to remove that small box by taking apart some plastic pieces (center stack cover, console cover, etc). Plug in the IBC that you must buy for about $100, and put it back together. There are some YouTube videos on the subject. Be cautious about which IBC you buy. A Ford dealer will ask you for your VIN so you get the correct one. The ones for sale on eBay might not be the correct one for your vehicle.
Now you must tell the computer that the IBC is installed. A decent Ford dealership can do that for you, or you can do it yourself with the Forscan program. There are 2 lines of code that need modification. That is another entire discussion.
You probably also need to install a relay that Ford provides. Should be in your glove compartment unless somebody removed it or already installed it.