I figured it out on my own. Here is all you need to do for others needing help
on the back of the knife you take out the middle torx screw, near the safety switch.
then with the knife open, look in and you will see a small bar at the bottom. this is where the small notch in the spring will sit.
stick the spring notch in behind the bar. then you just continue to push the rest of the spring in until it falls into place behind the thumb "lever lock(not sure it true name)
remember to put the torx screw back in.
Voila, enjoy!