[Puntmefar]

Are you refreing to the connector that runs along the frame of the gun from the trigger to the rear of the gun? If so it conects the trigger to the trigger housing and the nub you see sticking up half way down the bar is to depress the safty plunger so the sear pin can move foward far enough to hit the primer. Otherwise the safty plunger will block the sear pin from its full travel as its desighned to so. other than that its the same function as any other connector you might find in any other gun. IM not familier with other gun as well as I am glocks. If im awnsering the wrong question then im sorry im misunderstanding the question.