You may not need a complete harness ($$$$ if available !! )
You 'should' remove it though, clean it, then carefully slice away the sheathing for about 8-10" from that connector. If it's OK,just cut near the connector and splice in new wire to replace the damages sections. As long as you have 3/4" of 'connector ends' of the wires,it is repairable. If you can 'offset' cut the wires ( ie: NOT all the same length, then remove the plastic 'sleeve' from 'butt' connectors. Slide heat shrink onto a wire, crimp the bare 'butt',tug the wires to confirm a good crimp. Then heat the heat shrink, repeat 5 more times. Try to use wires with colors that match the original or at least take a few pictures .
When this is done, connect and test, if OK, THEN use black tape to wrap the harness up 'goo as new'.
For sure get a wiring diagram ( from WSM),make notes on it what you did. As well try to figure out what CAUSED the wires to 'fry'. Check all the fuses, besure they're the correct values, before powering up.