Spot on Jack, I ran 2 hoses the size of garden hose through that location for the water to air intercooler tank. Take off the drivers side inner guard and you'll see it clearly. It will run through the factory opening under the engine bay fuse panel.
Alternatively you can poke a hole in the loom near the brake booster or where the gear shifter cables run through which is where I ran my wide band wires. Plenty of places, but to keep it looking neat go with the inner guard route.