Can I rebind the key board ?

I've played a few matches and I have only been able to locate the lever action in front of the church. I've unlocked all the areas, flipped all the switches, picked up the two odd items where one is double bars and the other some stocky metal piece. Despite all that, I have no clue what the items are or what they go to. I've searched everything I believe. There's a weird crane set piece that does not seem interactable, and the pieces I picked up don't seem to fit anywhere. Hints? Apparently there's a thir...

I just jumped over the gate https://www.youtube.com/watch?v=NUuoQBRNepc