Yes, it is on top mate, you need to take the nut off the middle of it, you will porbably have to clamp the mount with something, I used an air gun to shock the bolt to undo it.
Then undo the two smaller ones, make sure you have a trolley jack under the box as it will drop down.
You will need a set of big stilsons to pull the mount off as it will be stuck to the big stud that runs through the middle of it