Problem with Signals and Slots

I know that I can only connect signals and slots between objects. I encounter this situation where I reimplement the mouseReleaseEvent of a QGraphicsLineItem object (e.g. myCable Class, cable object) and I wish to connect it to a QGraphicsScene object (e.g. myScene Class, scene object) but the object for myCable class was created in the scene.

Can someone give me some advice, I think I might have done something wrong here.

declare your own signal, connect it to your object and emit it where ever you want.

Make sure that your emitting object is subclassed from QObject.