No modifications to the mount itself are needed. All of the GOTO system can be taken right off the mount and it will function as before. Factory bolts can be put back if the GOTO system is taken off. This is a closer view of the cooler or rather battery box and laptop stand. This kind of box was chosen because it will keep the battery warmer in cold weather.
Cold temperatures diminish the voltage output of batteries.
The other reasons are that they are cheap, some have handles and wheels, and they are extremely strong. The battery weighs about 25 pounds and the laptop about 6 pounds. Balance is not a problem. I just screwed it into the bottom of the box with some small L - brackets. The coupling and the hole in the lid line up close to vertical.