All New Ionic Systems Hydra Water Fed Poles come standard with a quick connect fitting at the bottom of section one. This is where the fly lead connects and gets drawn up through the pole when you telescope upwards.
The legacy poles only had this feature for the Vertigo style pole.
This part is for the male Rectus connector / stem end that attaches at the base of the pole.
Choose the style you need depending on whether you have the new Hydra Water Fed Pole or the old Vertigo Style Pole as they are slightly different in design.