It goes above it in my 04 GT, way above it, it actually is on the top of the pinch weld on the top of the firewall.
Just be careful about that. A couple years ago I put a strut tower brace on my 04 and I put the harness under the brace, which made it contact the EGR tube, and I didn't realize it. It rubbed into the ground for injector #3, completing the circuit on that injector, causing it to spray fuel.
It really caused me a lot of headaches until I found it. Lol, I found it by accident.
My car started missing badly, throwing a cyl 3 misfire code. I thought it was the plug or coil so I switched them to another cylinder and still got a #3 miss. I stuck a noid light in the harness for the injector and it checked out fine because at the time the wire wasn't shorted. I ended up buying a new injector only to find it wasn't the problem either, so I knew it was in the ecm or the harness. I had the ignition off and the key in my pocket one day when I bumped the harness and heard the injector clicking. That's how I finally figured it out.
Sorry for the long post, but just pay very close attention to you're wire routing.