Vortex Sound Research

Just pulled the trigger on very nice used System-1M plug out but it doesn't seem to include the rack ears mentioned in rolands official product description.

I've got a basic 8u 19" rack space at home with just an 18i20 and a power conditioner in it at the moment so I wanted to situate it in between those two units but I'm unsure of what kind of rack accessory I'm after to get that done.