Ok, so you took the fish to an alternate home for the moment and want to continue the cycle by adding ammonia? If so, that'll work. Please post exact numbers for ammonia, nitrite, and nitrate to give us a better idea exactly where you are in the cycle, then we can further advise you from there.
Regarding your bettas, plural? You should only keep one betta in a small tank, they ain't called fighting fish for nothing. Unless you have a divider or something like that.