How / Where do I plug in the yellow symbol for drums in guitar hero?

Might seem like a silly question but I just got my ps2 back and world tour. Tried to set up the drums, I could see where the orange symbol went and the foot pedal but for the life of me cannot find a place to plug in the yellow symbol. Could some one please get back to me so I can rock on. Thanx...

There should be two cymbal wires, one for each cymbal. On the underside of the cymbal there will be a tiny hole to plug the wire into. The yellow one hooks up just like the orange one. Is one of your wires missing?