Audio Systems: changing speakers in my 97 dodge truck, factory speakers, infinity 1

Question
Hey Ernesto, I want to change the back factory speakers in my single cab truck and go to a little bigger speaker, the factory speakers has an easy four (4) wire plug and my new speaker only has the normal two (2) wire inputs "black" & "red". Any advice you could give on how I need to convert the four wires to two and in the right order would be great. Its a stocked Afinity speaker system.
THANKS for your time...

Answer
That is not a good idea  you can not change the speakers on that part, don't try , don't waste your time they will sound very bad and the volume will be low
you can only replace the speakers with infinity  1.5 ohms ONLY

your new speakers are 4 ohms