One more important question re AC breakers

I need to provide external breakers in a mobile RV setup for my Magnum MSH4024M inverter. This inverter has neutral-ground switching inside.

According to the Magnum manual I need a 60 amp breaker on the input AC and a 60 amp breaker on the output AC, both within 7 inches of the inverter if the cable is not in conduit or 40 inches if it is in conduit. I have smaller breakers in a Blue Sea marine panel for my various AC loads in my RV.

I am running out of space since this is a small camper and I have a Midnite baby box already for the solar breakers plus I have the 300 amp T type fuse for the Magnum DC side and a 300 amp DC switch.

Can I use another single Midnite baby box to house both 60 amp breakers for the Magnum inverter and run the input and output AC to and from this box or would I need to have two separate housings?

Thanks for any help.