Been a while since I replaced a Kia hood release, but don't think there is a cable ajustment.
Make certain it's not a problem with the latch assembly, and that was the reason a new latch assembly needed to be installed, not a cable problem.
So apparently I forgot how to car and while changing headlight bulbs I must have disconnected the hood latch cable. Theres a section where the cable has a ball tip that connects into a \/ type connector. Now I can't open the hood and I'm at a loss as to how to open it. I could bust out my SX...
Post #9 tells How he worked with a detached Trunk Release cable & this may be of future value with this or situation X.