according to the manufacturer it is not for Forte.
It fits 2016 Optima 1.6t, though.
As for F5 SX - 2017/2018 model.
Not sure if coils were changed. Could be as they added DCT tranny in place TC AT.
As for changing pins - my best bet would be the manufacturer to ask them for the pins assignment on their coils.
Having two pins on the car - find which one is ground and you are all done. Rewire and have fun.
no, I am not aware of any adapter.
the only thing I can think of is to go to a yard and get plugs from other cars and rewire yours.