Extend the harness from the far left (driver side) horn to reach the passenger side of the middle verticle support brace. There's an unused, threaded hole you can use. The other horn mounts fine in the same location as OE on the driver side of the middle verticle support brace. No problems at all. 10 minute install.
Edit: If you need me to, I'll pull the grill and take some pics for ya!