The ONLY difference between the V7 harness and the WRX harness is the AVCS plugs and the lack of TGV plugs. That's it. You don't need a wiring diagram because there is nothing to wire except the AVCS, and that info is readily available, as lots of people have done it. The information on how to wire the AVCS stuff can be found on wrxworld.com or ds1motorsports.com (if it comes back up anytime soon).