Okay if you are in square 4,6 and need to go to sublight 19,19 in your system, you hyper to 5,7 and then come back to 4,6 - this will put you in that corner.
If you hyper to 5,5 and return you will be at position 19,0 in system 4,6
if you hyper to 4,5 you will return at 10,0 in system 4,6
3,5 would be a 0,0 position in system 4,6 etc
Each system has 8 hyper access points so as long as you jump to the system next to your desired returned point you will get their quickly.