When searching for power & ground wires under the rear driver door kick panel you will want to you use the grey wire w/ violet strip for power (red wire) and the black w/ purple strip for ground. (sometimes black with yellow can also be used for ground)
We have found that on 21+ models the wire is sometimes more of a dark grey than the standard light grey we are used to seeing in prior years. Other times it is the standard light grey so keep an eye out for both.
*example of darker grey with violet in picture below