Questions about my Columbian red tail

[Capt.jack]

I recently acquired a male Columbian red tail. I've read that they are very inquisitive and curious snakes, and that they like to try and escape often. My red tail is always looking for a way out thoough. I have only had him for 6 days but I figured he would give it a rest, I'm wondering if its because he is trying to find my female dumerils that I have in the aquarium not 6 inches away. Also I'm wondering if this could be the cause of the cage aggression he has. Never bitten but he watches my hand like a hawk when the cage is opened, and sitting in a striking position. Do I have to separate them or get them out of eyesight of eachother? Just extra info my dumerils doesn't really seem phased by my red tails arrival, hisses a little bit but still sweet and tame when I hold her.