finding a way to secure the units would be great. By secure I mean to keep thieves from getting at them. If something similar to a lock lug on a car could be made, that screwed into the unit where the mounting knobs go, it would work.
Or have bolts with eyes welded on and once the bolts are screwed into the holes on the unit, run a cable or bicycle lock thru them then they cant be unscrewed.
That is how I would secure my small outboard s on. once the mounting handles were tightened, run a gun cable lock thru the holes, and lock it. you cannot turn the handles after that.
Then where the unit mounts to the floor of the boat, put a clevis pin with a hole thru it for a padlock.
JESUS CHRIST IS THE WAY, THE TRUTH. AND THE LIGHT. !!!! PUT ALL YOUR TROUBLES IN JESUS HANDS, YOU WILL SEE WHAT HE CAN DO.