thats not going to hold. the clip will break again sooner or later.glue it, epoxy it, what ever you think is necessary, as long as it works, and I'd probably try and throw in some kind of bracing like a thin strip of AL or Carbon if you have any laying around, glue it all together, use a vise, or even vise grips to help set it, and you should be golden.
you do need them though, the left side is now more backwards against engine bay because it isnt attached to the bumper, i tried to put something between the grille and engine bay but isnt a very clean solutionthats not going to hold. the clip will break again sooner or later.
but you dont really need the tabs.