Is there a second knock out on Xantrex DC250 Main breaker box encloser?

On the side of my encloser I have a 60 amp breaker to protect my charge controller.  I'm  adding another charge controller to my system so I believe I need to add another 60 or 80 amp breaker to protect the second charge controller. I am miles away from my system, and I'm ordering my second charge controller.  Is there another knock out in the side of my  Xantrex DC250 to place a second 80 amp breaker ? Or do I need to buy a seperate breaker box? Thank you

Steve