Replacing chrome bumper w/ RW bumper

Hello all,

I'm replacing my rear chrome OEM bumper with a RW black one. I'm getting conflicting information on the parking sensor retainer clips that I need.

Part# 303080-c0
303030-c0

Part# 89338-34010
89348-34020

I understand the inner sensor retainer clips are larger than the two outside resulting in two different part numbers. Which ones do I need for a RW rear bumper?

Thanks!