I read your previous post about bumper centre section removal.
You can remove the centre section cover to expose the factory (detachable) towbar fitting.
If you are considering fitting a complete new towbar, then you must remove much more than that to enable you to bolt the new structure to the chassis.
Good for you.
An enthusiastic approach and mild understanding of how the electrics work will see you through. Once you get the towbar, you will see exactly where it has to be bolted. You will have to remove the bumper reinforcing steel first to make way for the new structure, and this will involve removing the whole bumper (a socket set is about all you will need).
I chickened out on my previous car, mainly because of the electrics, and after consideration, a little over £100 for the labour didn't seem too bad.
Please let us know how you get on.