From under the front of the car:
Remove the plastic splash shield. You should see something that looks like this, except not bent like mine from a minor collision. The arrow shows a slot between the A/C condenser and the radiator that should provide you a straight shot up to the latch.
With a long, tool and a flashlight, you need to push the pawl where the cable attaches to the left (see arrow on latch). It will help a lot to have a second person pushing up and down on the hood as you are attempting this.