The line that 3-CPO takes along with the position of the TIE fighter pigs when you release 3-CPO and most importantly where you ignite 3-CPO. This one takes accuracy, patience and luck.
Let me know how you do or if you have any questions. I am still working on Level S-3 and will let you know when I find the soultion with one angry bird. Talk to you soon. Steamboat