A location with the least amount of foot traffic helps. You can cover the sides of the tank to help him settle down. I would recommend going as far as covering the entire tank with a towel or pillow case if you do not plan to use lights.
Imo I would quarantine him in a tub before moving him to the tank. For one, it will be a whole lot easier to disinfect and lightweight enough to move it around in case you decided the first location is not good. With that said, I would keep him in a different room or far away from your Kenyan boa until quarantine is over, which 90 days minimum is the recommended time.
No handling until he eats consistently for about 2-3 meals.
I am not sure what the feeding schedule would be for an older bp. I read the recommendation for adults are every 10 days but I think it also depends heavily on the current weight of your snake (Is it underweight?), breeding season or simply most snakes around this time are fasting for the winter.
Congrats on your new addition.