Snowjoe Charger hook

Snowjoe 24v 2 battery charger wall mount. Why they didn't put mounting holes on this thing is beyond me. It comes in two parts a bottom hook you set it in then a top hook that you put overtop to hold it I may try and combine them into one bit hook like I first had it. However, the top tended to slip out with the heavy batteries on. I have 12 amp-hour batteries, but smaller ones may not have this problem.