Well, ther is a newer version than the one i'm using. But, i'm so used to it i haven't upgraded yet.
It should be still, open your mod and get to the systems screen. Then, don't right click and choose edit. Instead, double click the left mouse button and you go into a different screen with none of the buttons on the left hand side.
To get back you just double click again. But, while you are in there you can this time right click and choose start jump hole, end jumphole, start jumpgate, end jumpgate.
You choose the first one, then double click out enter another system and right click to bring up the end jumpthing.
Note, you can't see the fields when inside the jumpgate/hole edit screen. So its best to add them and then rearrange in the edit mode. When moving jumpholes and gate, don't touch the zone that linked to the object. If you choose move on the left hand side you can move both of them together.
Well, thats about it. I hope it was understandable.

thank you, that was very helpfull

No probs..

The newer versions also have a Jump Gate/Hole button in Edit Mode.