IPhone 5s screen replacement

I recently broke my iPhone 5s (A) screen. My question is, I have another iPhone 5s (B) that I'm going to replace the screen with. When I replace the screen A, do I need to take the front facing camera/sensor cable too and the home button? Could I have a iPhone 5s with Screen B with the front facing camera/sensor cable with home button (A)? Only replacing the home button would make sense to me because of the different home bottom sensors and the cracked screen.