The connectors consist of the cap nut 1,the clamping seal 2, and  the center section 3, with internal shoulder, and the loknut 4. To make the conduit connection  the cap nut is pushed on to the conduit.
The damping seal is placed approximately 1 length behind the end of the conduit,so that in any case during the preliminary assembly it projects from the center section.(Only in this way can a good damping and sealing effect be achieved when screwing the nut tight).
The conduit prepared in this way is  fed into the centre section and the cap nut screwed firmly home.