I haven't done the install before but it shouldn't be too tricky. The horns should go where the OEM horns are. You have 3 that I know of. The left, the right, and the security horn. You want to replace the left and right horn, not the security. They are visible from front underneath the bumper. You'll see these round horns that look kind of like the horns you got.
See
this link for the horn diagram.
The tricky part will probably be mounting the horn and connecting the wires as you will have to cut off the OEM harness. Not really that hard to cut the wires but mounting the horns could pose a challenge. PM me if you want to work on it on a weekend, I'm in OC on weekends.