Please read the introduction instruction, please try to follow these instructions.
www.sugarglider.info/care/intros/
There are other websites with more information.
some glider owners have different ways of introducing gliders.
But in the end of the day, gliders are territorial animals, and if a strange or foreign glider comes into their territory they may defend that territory to the DEATH. They will try in the wild to chase off the stranger, in a closed area they may decide they have to kill the intruder.
So please look up more information, several websites make this information available before you put the gliders together again.