Hi! I just purchased a KJworks M9 full metal, but when disassembling the grip, the trigger bar ( kind of a spring) came out. This is the spring:

Now i dont know where it goes on the gun. I think it goes there:

But i dont know if it goes this way, or that way:

And is there a part missing? Because when i put the spring in place ( i tried both sides) and put the grip back together, i pull the trigger few times and then the spring comes out again... That's pretty annoying... :

If there's a part missing, could someone tell me what is it and show me what it looks like? Because i may have lost it somewhere while disassembling...
Thanks!