Looking at the pictures, it's bolted to a plate. I would either pull the plate and use the existing feet with some insulators or drill and mount the plate itself. As was stated above, I would add in at least an 8 gauge feed to it.
If you plan on hiding it behind a panel, make sure it has enough room around it. Those cylinder heads will put out a ton of heat. That goes for stacking gear around it in your cargo area also.
The ARB and most of the ViAir's are designed to be mounted. I have my viair behind a trim panel out of the way.