Yeah control box wise on the older D1 ARB it has a mount welded onto the bumper. Newer ARB I just used the Warn solenoid box and it's mounts screwed into the ARB.

 

Just an update, I bent the bumper winching over an obstacle recently with no pulley, just a 10k winch. Whole winch cradle is slightly bent out haha. The ARB is getting replaced with a RTE bumper. I'm seriously unhappy with it. Approach angle sucks, moves around under winching, and tweaks when it touches a rock.