From what I can tell, it looks like you're just missing the 25 cent relay.
Typically not there for single coin games. Mine was like that when I got it but I converted it from a 10 cent game to a 10/25 cent game because I like all my games to be coin op. And yes, even though I 'had' this already with just the single chute, I still wanted a double coin chute game (like all my other metal rails).