Well.. I screwed down the spring holder eyelet with one of the existing screwes, and I attached the spring to it.
I dont think placement of the spring is such a big deal as long as you follow these "rules"

!) Find a good spot where it has good tension, but isnt stretched so bad that it pops off
2) Make sure it DOESNT TOUCH or RUB ON ANYTHING!
This CAN cause radio noise
3) Dont attach it to something that moves (the other side..)
4) Mine hits the brakes a little if the servo battery dies.. yes the servo has to fight this.. but its soo mild it shouldnt matter!
-ram