we put gliders into tub with NOTHING, just them, if they settle down and get
along then we add a clean, scent free sleeping pouch. see how they get along
inside it. (this is also done at daytime when they sleepy).
we had one failure, gus would not except two gliders that used to be in the
colony and had returned after a few years. so we had to rehome the two gliders.
gus is very bossy alpha of the colony, during treat time I have to watch him
cause he gets aggressive if to close to other gliders so I keep him slightly away.
this is usually only during LIVE mealworm treat time.
but if your male is a strong alpha he may NOT want another male in the colony.
specially a unneutered one.
I would try to only introduce the two males, scent free tub, be ready for a
fight, no pouch. maybe do some more pouch swap before this introduction swap
sleeping pouch every 2 days. in the end if it fails you can't put them together.