2.5 gen bumper fitment question

Do I need the center, right and left bumper support rails (mine were destroyed in an accident, and see photo for what they are) to install my OEM bumper trim piece. I just need this to fill the gap left by the 2.5 gen ARB bumper. Or will it fit on the support rail attachment points (see photo)?



Parts 6,7 and the left piece isn’t listed but I’ll need that one too.





Or can I fit the trim piece over the support rail attachment points, without the rail support system, where the screws pop up at each attachment point.



It doesn’t have to be perfect, I figure if the holes on the trim piece align with the support rail attachment points (I can’t tell without removing the ARB) I’ll just get some nuts and tighten those three points down along with wedging the ARB against it, I need to readjust it anyways to close the fender gaps. I’m confident that if it fits without the rail support system it will be secure and won’t go anywhere.

Maybe I’m missing something, so all advice/insights are welcome and appreciated, thanks!