exrex22

Does anyone know what is involved to upgrade from a base model (with manual seats) to a premium or limited seat with power adjust and heating? It seems that the base models don't have the wiring harness already under the carpet, but I see a wiring harness for the seat is available - does this mean that if I purchase the wiring harness, connect it to the correct location in the fuse box, and plug it in to the replacement seat (an original 5th gen legacy seat) that this would work? Thanks!