It really is not straight forward. You will either need to obtain the template to cut holes in your bumper for the tabs on the back of the "Bumper Support" or you will need to cut off the tabs and glue the Bumper Support on.

If you do cut the holes you will need to instal the metal clips on the back of the tabs to secure the Bumper Support. It can be done with the bumper on the vehicle. It is far easier with the bumper off but the rear bumper is a pain in the ass to get off.

I do not have the template but someone else on here must have one.