Hard to believe any Giant scale manufacturer would make a product where you solder the cable. The stiffness of the solder causes a stress concentration spot on the cable very likely to fatigue - right at the end of the solder. Is that where this one broke??

One way to make pull-pull a little more failsafe is to loop it through the eyelet and crimp tube a second time - with a slightly looser loop the 2nd time. If the first loop breaks, the second one will be there. You would notice a difference in trim and precision, but would probably be able to land.